Name: Seongchan Hong
Country: Republic of Korea
Birthdate: 30.06.97, 27 years
ATP ranking: 312
TOP ranking's position: 139 (16.09.24, 413 points)
Points: 165
Prize money: 422.134 $
Matches total: 455
Win: 281
%: 61.76 %
Country: Republic of Korea
Birthdate: 30.06.97, 27 years
ATP ranking: 312
TOP ranking's position: 139 (16.09.24, 413 points)
Points: 165
Prize money: 422.134 $
Matches total: 455
Win: 281
%: 61.76 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2024 | 43/28 | 42/23 | 0/1 | 1/2 | 0/0 | 0/2 | 0/0 |
| 2023 | 27/34 | 17/18 | 5/6 | 5/6 | 0/0 | 0/4 | 0/0 |
| 2022 | 40/18 | 36/12 | 4/3 | 0/3 | 0/0 | 0/0 | 0/0 |
| 2021 | 17/8 | 7/3 | 10/4 | 0/1 | 0/0 | 0/0 | 0/0 |
| 2019 | 31/9 | 31/9 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2018 | 21/15 | 21/13 | 0/0 | 0/1 | 0/0 | 0/1 | 0/0 |
| 2017 | 18/16 | 14/15 | 4/1 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2016 | 42/15 | 42/12 | 0/0 | 0/1 | 0/1 | 0/1 | 0/0 |
| 2015 | 31/17 | 27/13 | 4/3 | 0/0 | 0/0 | 0/1 | 0/0 |
| 2014 | 8/7 | 5/5 | 3/1 | 0/0 | 0/0 | 0/1 | 0/0 |
| 2013 | 3/7 | 3/5 | 0/1 | 0/0 | 0/0 | 0/1 | 0/0 |
| TOTAL | 281/174 | 245/128 | 30/20 | 6/14 | 0/1 | 0/11 | 0/0 |
| perc. % | 61.76 % | 65.68 % | 60 % | 30 % | 0 % | 0 % | 0 % |
Seongchan Hong / Fixtures
| no matches found |
Seongchan Hong form / surface: Hard
Seongchan Hong / surface: Hard
| 01.10.24 | qual. | Yosuke Watanuki | Seongchan Hong | 6-2, 7-5 |  | match details |  Shanghai | Hard |
| 30.09.24 | q 1 | Seongchan Hong | Illya Marchenko | 7-65, 6-4 |  | match details | ||
| 17.09.24 | q 1 | Alibek Kachmazov | Seongchan Hong | 6-4, 6-1 | | match details | Chengdu | Hard |
| 04.09.24 | 2nd round | Dalibor Svrcina | Seongchan Hong | 7-5, 6-3 | | match details | Shanghai Challenger | Hard |
| 03.09.24 | 1st round | Seongchan Hong | Tung-Lin Wu | 6-72, 6-4, 6-4 | | match details | ||
| 21.08.24 | q 2 | Kyrian Jacquet | Seongchan Hong | 4-6, 6-3, 7-5 | | match details |  New York | Hard |
| 19.08.24 | q 1 | Seongchan Hong | Jozef Kovalik | 6-4, 6-76, 7-5 | | match details | ||
| 31.08.24 | 1/2 | Yasutaka Uchiyama | Seongchan Hong | 6-3, 6-76, 4-0, Seongchan Hong - retired | | match details | Zhangjiagang Challenger | Hard |
| 30.08.24 | 1/4 | Seongchan Hong | Fajing Sun | 5-7, 6-2, 6-2 | | match details | ||
| 29.08.24 | 2nd round | Seongchan Hong | Yan Bai | 6-2, 6-1 | | match details | ||
| 27.08.24 | 1st round | Seongchan Hong | Evgeny Donskoy | 4-6, 7-61, 6-2 | | match details | ||
| 12.08.24 | 1st round | Mattia Bellucci | Seongchan Hong | 6-4, 6-2 | | match details | Cary Challenger | Hard |
| 11.08.24 | qual. | Seongchan Hong | Valentin Royer | 6-4, 7-68 | | match details | ||
| 10.08.24 | q 1 | Seongchan Hong | Alex Bolt | 6-1, 6-1 | | match details | ||
| 01.08.24 | 3rd round | Alex Michelsen | Seongchan Hong | 6-3, 6-3 | | match details | Washington | Hard |
| 31.07.24 | 2nd round | Seongchan Hong | Karen Khachanov | 6-2, 6-4 | | match details | ||
| 29.07.24 | 1st round | Seongchan Hong | Adam Walton | 7-66, 7-64 | | match details | ||
| 28.07.24 | qual. | Seongchan Hong | Paul Jubb | 6-4, 7-5 | | match details | ||
| 27.07.24 | q 1 | Seongchan Hong | Alex Bolt | 6-4, 6-4 | | match details | ||
| 26.07.24 | 1/4 | Learner Tien | Seongchan Hong | 6-3, 6-1 | | match details | Chicago Challenger | Hard |
| 24.07.24 | 2nd round | Seongchan Hong | Charles Broom | 6-3, 6-74, 6-4 | | match details | ||
| 22.07.24 | 1st round | Seongchan Hong | Alex Bolt | 6-4, 6-3 | | match details | ||
| 08.07.24 | 1st round | Yuta Shimizu | Seongchan Hong | 6-2, 7-5 | | match details |  Winnipeg Challenger | Hard |
| 07.06.24 | 1/4 | Liam Draxl | Seongchan Hong | 6-2, 6-2 | | match details | Tyler Challenger | Hard |
| 06.06.24 | 2nd round | Seongchan Hong | Ernesto Escobedo | 3-6, 6-4, 6-2 | | match details | ||
| 04.06.24 | 1st round | Seongchan Hong | Andres Andrade | 6-2, 2-6, 7-61 | | match details | ||
| 29.05.24 | 2nd round | Brandon Holt | Seongchan Hong | 6-2, 6-3 | | match details | Little Rock | Hard |
| 28.05.24 | 1st round | Seongchan Hong | Murphy Cassone | 6-4, 3-6, 6-2 | | match details | ||
| 16.05.24 | 1/4 | Yu Hsiou Hsu | Seongchan Hong | 6-4, 4-6, 6-1 | | match details | .png){kind=small} Taipei Challenger | Hard |
| 15.05.24 | 2nd round | Seongchan Hong | Blake Ellis | 6-2, 6-2 | | match details | ||
| 14.05.24 | 1st round | Seongchan Hong | Moez Echargui | 7-67, 6-2 | | match details | ||
| 08.05.24 | 2nd round | Alibek Kachmazov | Seongchan Hong | 6-1, 2-6, 7-66 | | match details | Wuxi Challenger | Hard |
| 06.05.24 | 1st round | Seongchan Hong | Illya Marchenko | 6-3, 6-3 | | match details | ||
| 18.04.24 | 2nd round | Sho Shimabukuro | Seongchan Hong | 6-4, 6-4 | | match details |  Gwangju Challenger | Hard |
| 16.04.24 | 1st round | Seongchan Hong | Illya Marchenko | 6-3, 6-2 | | match details | ||
| 14.04.24 | fin | Yasutaka Uchiyama | Seongchan Hong | 7-64, 6-3 | | match details | Busan Challenger | Hard |
| 13.04.24 | 1/2 | Seongchan Hong | Soon-Woo Kwon | Soon-Woo Kwon - walk over | | match details | ||
| 12.04.24 | 1/4 | Seongchan Hong | Chak Lam Coleman Wong | 6-4, 3-6, 6-2 | | match details | ||
| 11.04.24 | 2nd round | Seongchan Hong | Mark Lajal | 6-4, 6-4 | | match details | ||
| 09.04.24 | 1st round | Seongchan Hong | Otto Virtanen | 6-2, 6-2 | | match details | ||
| 11.03.24 | q 1 | David Goffin | Seongchan Hong | 6-2, 6-4 | | match details | Phoenix Challenger | Hard |
| 07.03.24 | 1st round | Jakub Mensik | Seongchan Hong | 6-3, 6-4 | | match details | Indian Wells | Hard |
| 05.03.24 | qual. | Seongchan Hong | Sumit Nagal | 2-6, 6-2, 7-64 | | match details | ||
| 04.03.24 | q 1 | Seongchan Hong | Soon-Woo Kwon | 6-3, 6-3 | | match details | ||
| 27.02.24 | 1st round | Tristan Boyer | Seongchan Hong | 6-3, 6-72, 7-67 | | match details |  New Delhi | Hard |
| 20.02.24 | 1st round | Maks Kasnikowski | Seongchan Hong | 6-4, 6-2 | | match details | Pune Challenger | Hard |
| 18.02.24 | fin | Stefano Napolitano | Seongchan Hong | 4-6, 6-3, 6-3 | | match details | Bengaluru Challenger | Hard |
| 17.02.24 | 1/2 | Seongchan Hong | Oriol Roca Batalla | 6-2, 3-6, 6-3 | | match details | ||
| 16.02.24 | 1/4 | Seongchan Hong | Ramkumar Ramanathan | 7-5, 5-7, 6-4 | | match details | ||
| 14.02.24 | 2nd round | Seongchan Hong | Alexey Zakharov | 6-4, 7-5 | | match details | ||
| 13.02.24 | 1st round | Seongchan Hong | Tristan Schoolkate | 6-4, 6-3 | | match details | ||
| 21.01.24 | fin | Matteo Gigante | Seongchan Hong | 6-4, 6-1 | | match details |  Nonthaburi 3 | Hard |
| 20.01.24 | 1/2 | Seongchan Hong | Giovanni Fonio | 6-4, 6-1 | | match details | ||
| 19.01.24 | 1/4 | Seongchan Hong | Dennis Novak | 6-2, Dennis Novak - retired | | match details | ||
| 17.01.24 | 2nd round | Seongchan Hong | Benjamin Hassan | 6-2, 6-3 | | match details | ||
| 16.01.24 | 1st round | Seongchan Hong | Oriol Roca Batalla | 3-6, 7-65, 6-3 | | match details | ||
| 15.01.24 | qual. | Seongchan Hong | Salvatore Caruso | 6-2, 6-73, 6-2 | | match details | ||
| 14.01.24 | q 1 | Seongchan Hong | Siwanat Auytayakul | 7-60, 6-1 | | match details | ||
| 09.01.24 | 1st round | Brandon Holt | Seongchan Hong | 6-2, 6-2 | | match details | Nonthaburi 2 | Hard |
| 05.01.24 | 1/2 | Lucas Pouille | Seongchan Hong | 6-3, 6-3 | | match details | Nonthaburi 1 | Hard |
| 04.01.24 | 1/4 | Seongchan Hong | Marat Sharipov | 3-6, 6-3, 6-2 | | match details | ||
| 03.01.24 | 2nd round | Seongchan Hong | Mark Lajal | 2-6, 6-4, 7-5 | | match details | ||
| 02.01.24 | 1st round | Seongchan Hong | Pierre-Hugues Herbert | 6-4, 2-6, 6-3 | | match details | ||
| 01.01.24 | qual. | Seongchan Hong | Hady Habib | 4-6, 6-3, 6-2 | | match details | ||
| 31.12.23 | q 1 | Seongchan Hong | Nick Hardt | 1-6, 6-1, 6-3 | | match details | ||
| 27.11.23 | 1st round | Omar Jasika | Seongchan Hong | 6-77, 6-4, 6-2 | | match details |  Yokkaichi Challenger | Hard |
| 21.11.23 | 2nd round | Yasutaka Uchiyama | Seongchan Hong | 2-6, 6-4, 6-4 | | match details | Yokohama Challenger | Hard |
| 19.11.23 | 1st round | Seongchan Hong | Jurij Rodionov | 7-66, 7-66 | | match details | ||
| 07.11.23 | 1st round | Luca Nardi | Seongchan Hong | 7-5, 3-6, 7-64 | | match details | Matsuyama Challenger | Hard |
| 31.10.23 | 1st round | Rio Noguchi | Seongchan Hong | 6-2, 6-2 | | match details |  Sydney Challenger | Hard |
| 27.10.23 | 1/4 | Rinky Hijikata | Seongchan Hong | 6-1, 6-1 | | match details | Playford Challenger | Hard |
| 26.10.23 | 2nd round | Seongchan Hong | Naoki Nakagawa | 6-3, 6-3 | | match details | ||
| 24.10.23 | 1st round | Seongchan Hong | Jayden Court | 7-67, 6-3 | | match details | ||
| 03.10.23 | qual. | Dane Sweeny | Seongchan Hong | 6-2, 6-1 | | match details | Shanghai | Hard |
| 02.10.23 | q 1 | Seongchan Hong | Ergi Kirkin | 7-5, 6-3 | | match details | ||
| 04.09.23 | qual. | Yshai Oliel | Seongchan Hong | 6-4, 6-1 | | match details |  Istanbul Challenger | Hard |
| 03.09.23 | q 1 | Seongchan Hong | Cengiz Aksu | 6-2, 6-4 | | match details | ||
| 24.08.23 | q 2 | Taro Daniel | Seongchan Hong | 6-2, 4-6, 6-1 | | match details | New York | Hard |
| 22.08.23 | q 1 | Seongchan Hong | Francesco Passaro | 7-63, 6-4 | | match details | ||
| 13.08.23 | 1st round | Alex Michelsen | Seongchan Hong | 4-6, 6-2, 6-0 | | match details | Stanford Challenger | Hard |
| 10.08.23 | 2nd round | Patrick Kypson | Seongchan Hong | 6-4, 6-4 | | match details | Cary 1 | Hard |
| 08.08.23 | 1st round | Seongchan Hong | Alexander Shevchenko | 3-6, 6-3, 7-64 | | match details | ||
| 04.08.23 | 1/4 | Tennys Sandgren | Seongchan Hong | 6-4, 6-2 | | match details | Lexington Challenger | Hard |
| 02.08.23 | 2nd round | Seongchan Hong | Bernard Tomic | 6-1, 6-2 | | match details | ||
| 31.07.23 | 1st round | Seongchan Hong | Nam Hoang Ly | 6-1, 7-5 | | match details | ||
| 09.05.23 | 1st round | Jason Jung | Seongchan Hong | 6-2, 3-0, Seongchan Hong - retired | | match details | Busan Challenger | Hard |
| 28.04.23 | 1/4 | Bu Yunchaokete | Seongchan Hong | 6-4, 6-4 | | match details | Seoul Challenger | Hard |
| 27.04.23 | 2nd round | Seongchan Hong | Max Purcell | 6-1, 6-3 | | match details | ||
| 26.04.23 | 1st round | Seongchan Hong | Tatsuma Ito | 6-3, 6-2 | | match details | ||
| 07.03.23 | 1st round | Ulises Blanch | Seongchan Hong | 6-3, 6-3 | | match details |  Puerto Vallarta | Hard |
| 03.03.23 | 1/4 | Alexandre Muller | Seongchan Hong | 6-77, 7-61, 6-2 | | match details | Waco Challenger | Hard |
| 01.03.23 | 2nd round | Seongchan Hong | Nicolas Mejia | 7-5, 6-1 | | match details | ||
| 28.02.23 | 1st round | Seongchan Hong | Mattia Bellucci | 6-4, 6-1 | | match details | ||
| 15.02.23 | 2nd round | Arthur Cazaux | Seongchan Hong | 6-3, 6-4 | | match details | Chennai Challenger | Hard |
| 13.02.23 | 1st round | Seongchan Hong | Sebastian Ofner | 6-4, 6-3 | | match details | ||
| 21.01.23 | 1/2 | Sho Shimabukuro | Seongchan Hong | 6-2, 7-5 | | match details | Nonthaburi 3 | Hard |
| 20.01.23 | 1/4 | Seongchan Hong | Michael Geerts | 6-1, 7-5 | | match details | ||
| 18.01.23 | 2nd round | Seongchan Hong | Nam Hoang Ly | 6-2, 7-63 | | match details | ||
| 16.01.23 | 1st round | Seongchan Hong | Kasidit Samrej | 6-4, 6-4 | | match details | ||
| 02.01.23 | 1st round | Thomas Fancutt | Seongchan Hong | 6-4, 3-6, 6-3 | | match details |  Noumea Challenger | Hard |
| 13.11.22 | fin | Seongchan Hong | Tung-Lin Wu | 6-3, 6-2 | | match details | Matsuyama Challenger | Hard |
| 12.11.22 | 1/2 | Seongchan Hong | Shintaro Mochizuki | 6-1, 2-6, 6-3 | | match details | ||
| 11.11.22 | 1/4 | Seongchan Hong | Jason Jung | 6-1, 6-4 | | match details | ||
| 10.11.22 | 2nd round | Seongchan Hong | Nino Serdarusic | 6-4, 6-2 | | match details | ||
| 08.11.22 | 1st round | Seongchan Hong | Mukund Sasikumar | 6-2, 6-1 | | match details | ||
| 07.11.22 | qual. | Seongchan Hong | Shinji Hazawa | 6-3, 6-4 | | match details | ||
| 06.11.22 | q 1 | Seongchan Hong | Kentaro Otsuka | 6-0, 6-1 | | match details | ||
| 31.10.22 | 1st round | Kaichi Uchida | Seongchan Hong | 3-6, 7-5, 6-3 | | match details | Yokohama Challenger | Hard |
| 30.10.22 | qual. | Seongchan Hong | Keisuke Saitoh | 6-2, 7-5 | | match details | ||
| 29.10.22 | q 1 | Seongchan Hong | Yusaku Sugaya | 6-1, 6-2 | | match details | ||
| 22.10.22 | 1/2 | Radu Albot | Seongchan Hong | 7-62, 6-3 | | match details | Busan Challenger | Hard |
| 21.10.22 | 1/4 | Seongchan Hong | John Millman | 3-6, 6-4, 7-5 | | match details | ||
| 20.10.22 | 2nd round | Seongchan Hong | Yunseong Chung | 6-3, 7-5 | | match details | ||
| 18.10.22 | 1st round | Seongchan Hong | Li Tu | 6-3, 3-6, 6-1 | | match details | ||
| 17.10.22 | qual. | Max Purcell | Seongchan Hong | 7-65, 6-0 | | match details | ||
| 16.10.22 | q 1 | Seongchan Hong | Suk Ann | 6-2, 6-2 | | match details | ||
| 04.10.22 | 1st round | Mukund Sasikumar | Seongchan Hong | 4-6, 6-1, 7-5 | | match details | Gwangju Challenger | Hard |
| 26.09.22 | 1st round | Kaichi Uchida | Seongchan Hong | 6-4, 6-2 | | match details | Seoul | Hard |
| 25.08.22 | 2nd round | Yasutaka Uchiyama | Seongchan Hong | 6-3, 6-3 | | match details | Nonthaburi 1 | Hard |
| 23.08.22 | 1st round | Seongchan Hong | Bu Yunchaokete | 4-6, 6-1, 3-0, Bu Yunchaokete - retired | | match details | ||
| 22.08.22 | qual. | Seongchan Hong | Tristan Schoolkate | 7-62, 4-6, 6-4 | | match details | ||
| 21.08.22 | q 1 | Seongchan Hong | Stuart Parker | 6-3, 1-6, 6-3 | | match details | ||
| 02.08.22 | 1st round | Prajnesh Gunneswaran | Seongchan Hong | 3-6, 6-3, 7-5 | | match details |  M25 Tbilisi | Hard |
| 26.07.22 | 1st round | Daniil Ostapenkov | Seongchan Hong | 6-3, 6-3 | | match details | M25 Tbilisi | Hard |
| 19.07.22 | 1st round | Roman Safiullin | Seongchan Hong | 6-2, 3-6, 6-3 | | match details |  Nur Sultan | Hard |
| 18.07.22 | qual. | Seongchan Hong | Zura Tkemaladze | 3-6, 6-3, 6-2 | | match details | ||
| 17.07.22 | q 1 | Seongchan Hong | Min-Kyu Song | 6-1, 6-4 | | match details | ||
| 12.06.22 | fin | Sho Shimabukuro | Seongchan Hong | 3-6, 6-4, 6-1 | | match details |  M25 Harmon | Hard |
| 11.06.22 | 1/2 | Seongchan Hong | Cheong-Eui Kim | 6-3, 6-3 | | match details | ||
| 10.06.22 | 1/4 | Seongchan Hong | Kokoro Isomura | 6-2, 6-3 | | match details | ||
| 09.06.22 | 2nd round | Seongchan Hong | Huzaifa Abdul Rehman | 6-0, 7-64 | | match details | ||
| 08.06.22 | 1st round | Seongchan Hong | Jared Thompkins | 7-5, 6-1 | | match details | ||
| 05.06.22 | fin | Seongchan Hong | Rio Noguchi | 6-3, 6-2 | | match details | M25 Harmon | Hard |
| 04.06.22 | 1/2 | Seongchan Hong | Cheong-Eui Kim | 6-2, 6-0 | | match details | ||
| 03.06.22 | 1/4 | Seongchan Hong | Ji Sung Nam | 6-2, 5-7, 6-1 | | match details | ||
| 02.06.22 | 2nd round | Seongchan Hong | Eric Padgham | 6-2, 6-3 | | match details | ||
| 31.05.22 | 1st round | Seongchan Hong | Huzaifa Abdul Rehman | 6-2, 6-1 | | match details | ||
| 21.04.22 | 2nd round | Kasidit Samrej | Seongchan Hong | 3-6, 7-65, 6-4 | | match details | M15 Chiang | Hard |
| 20.04.22 | 1st round | Seongchan Hong | S D Prajwal Dev | 5-7, 6-4, 6-2 | | match details | ||
| 17.04.22 | fin | Seongchan Hong | Nam Hoang Ly | 6-3, 3-6, 7-5 | | match details | M15 Chiang | Hard |
| 16.04.22 | 1/2 | Seongchan Hong | Ji Sung Nam | 6-1, 6-2 | | match details | ||
| 15.04.22 | 1/4 | Seongchan Hong | Sidharth Rawat | 6-3, 3-6, 6-4 | | match details | ||
| 14.04.22 | 2nd round | Seongchan Hong | Orel Kimhi | 6-1, 7-5 | | match details | ||
| 13.04.22 | 1st round | Seongchan Hong | Takuto Niki | 6-3, 6-4 | | match details | ||
| 09.04.22 | 1/2 | Yan Bai | Seongchan Hong | 6-2, 6-2 | | match details | M15 Chiang | Hard |
| 08.04.22 | 1/4 | Seongchan Hong | Taisei Ichikawa | 6-2, 6-1 | | match details | ||
| 07.04.22 | 2nd round | Seongchan Hong | Colin Markes | 4-6, 7-65, 6-0 | | match details | ||
| 06.04.22 | 1st round | Seongchan Hong | Jirat Navasirisomboon | 6-1, 7-5 | | match details | ||
| 04.07.21 | fin | Seongchan Hong | Luca Giacomini | 7-5, 6-3 | | match details |  M15 Monastir | Hard |
| 03.07.21 | 1/2 | Seongchan Hong | Moez Echargui | 6-3, 6-0 | | match details | ||
| 02.07.21 | 1/4 | Seongchan Hong | Hady Habib | 6-2, 6-2 | | match details | ||
| 01.07.21 | 2nd round | Seongchan Hong | Samuel Vincent Ruggeri | 6-1, 6-1 | | match details | ||
| 29.06.21 | 1st round | Seongchan Hong | Alberto Barroso Campos | 6-4, 3-1, Alberto Barroso Campos - retired | | match details | ||
| 23.06.21 | 1st round | Terence Atmane | Seongchan Hong | 6-4, 6-4 | | match details | M15 Monastir | Hard |
| 15.06.21 | 1st round | Luciano Darderi | Seongchan Hong | 6-4, 6-4 | | match details | M15 Monastir | Hard |
| 11.06.21 | 1/4 | Guy Orly Iradukunda | Seongchan Hong | 6-4, 6-4 | | match details | M15 Monastir | Hard |
| 10.06.21 | 2nd round | Seongchan Hong | Uisung Park | 6-2, 1-0, Uisung Park - retired | | match details | ||
| 08.06.21 | 1st round | Seongchan Hong | Emil Reinberg | 6-1, 6-2 | | match details | ||
| 17.10.19 | 2nd round | Naoki Nakagawa | Seongchan Hong | 6-4, 7-610 | | match details | M15 Changwon | Hard |
| 15.10.19 | 1st round | Seongchan Hong | Seungri Choi | 6-1, 6-0 | | match details | ||
| 01.09.19 | 1/2 | Ryan Peniston | Seongchan Hong | 6-2, 3-6, 6-3 | | match details | M15 Hua | Hard |
| 30.08.19 | 1/4 | Seongchan Hong | Yuanfeng Li | 6-1, 6-2 | | match details | ||
| 29.08.19 | 2nd round | Seongchan Hong | George Loffhagen | 6-3, 6-2 | | match details | ||
| 28.08.19 | 1st round | Seongchan Hong | Taisei Ichikawa | 6-4, 6-3 | | match details | ||
| 25.08.19 | fin | Seongchan Hong | Dayne Kelly | 7-5, 6-3 | | match details | M15 Hua | Hard |
| 24.08.19 | 1/2 | Seongchan Hong | Ryan Peniston | 4-6, 6-3, 6-3 | | match details | ||
| 23.08.19 | 1/4 | Seongchan Hong | Chukang Wang | 6-1, 6-4 | | match details | ||
| 22.08.19 | 2nd round | Seongchan Hong | Billy Harris | 6-3, 6-0 | | match details | ||
| 21.08.19 | 1st round | Seongchan Hong | Seita Watanabe | 6-1, 6-2 | | match details | ||
| 23.06.19 | fin | Seongchan Hong | Yuta Shimizu | 6-1, 5-7, 6-2 | | match details | M15 Gimcheon | Hard |
| 22.06.19 | 1/2 | Seongchan Hong | Ryota Tanuma | 6-3, 6-0 | | match details | ||
| 21.06.19 | 1/4 | Seongchan Hong | Taisei Ichikawa | 6-1, 6-3 | | match details | ||
| 20.06.19 | 2nd round | Seongchan Hong | Minjong Park | 6-71, 6-2, 6-3 | | match details | ||
| 19.06.19 | 1st round | Seongchan Hong | Sung Hun Kim | 6-0, 6-1 | | match details | ||
| 14.06.19 | 1/4 | Yuta Shimizu | Seongchan Hong | 6-1, 6-1 | | match details | M15 Gimcheon | Hard |
| 13.06.19 | 2nd round | Seongchan Hong | Ken Onishi | 6-1, 6-2 | | match details | ||
| 12.06.19 | 1st round | Seongchan Hong | Wanseok Kang | 6-0, 6-2 | | match details | ||
| 09.06.19 | fin | Seongchan Hong | Jung-Woong Na | 6-0, 6-3 | | match details | M15 Daegu | Hard |
| 08.06.19 | 1/2 | Seongchan Hong | Seong-Gook Oh | 6-1, 6-2 | | match details | ||
| 07.06.19 | 1/4 | Seongchan Hong | Thomas Fancutt | 7-60, 1-0, Thomas Fancutt - retired | | match details | ||
| 06.06.19 | 2nd round | Seongchan Hong | Dong Ju Kim | 6-3, 6-2 | | match details | ||
| 04.06.19 | 1st round | Seongchan Hong | Ju-Hae Moon | 6-1, 6-3 | | match details | ||
| 13.05.19 | 1st round | Konstantin Kravchuk | Seongchan Hong | 3-6, 7-63, 6-2 | | match details | Gwangju Challenger | Hard |
| 06.05.19 | 1st round | Kaichi Uchida | Seongchan Hong | 6-2, 7-5 | | match details | Busan Challenger | Hard |
| 29.04.19 | 1st round | Rio Noguchi | Seongchan Hong | 3-6, 6-4, 6-0 | | match details | Seoul Challenger | Hard |
| 13.04.19 | 1/2 | Shuichi Sekiguchi | Seongchan Hong | 6-2, 6-3 | | match details | M25 Matsuyama | Hard |
| 12.04.19 | 2nd round | Seongchan Hong | Rio Noguchi | 6-2, 6-3 | | match details | ||
| 12.04.19 | 1/4 | Seongchan Hong | Sho Shimabukuro | 6-2, 6-2 | | match details | ||
| 10.04.19 | 1st round | Seongchan Hong | Shintaro Imai | 5-0, Shintaro Imai - retired | | match details | ||
| 17.03.19 | fin | Seongchan Hong | Shuichi Sekiguchi | 7-64, 6-4 | | match details | M15 Nishi | Hard |
| 16.03.19 | 1/2 | Seongchan Hong | Hiroyasu Ehara | 6-2, 6-3 | | match details | ||
| 15.03.19 | 1/4 | Seongchan Hong | Blake Ellis | 3-6, 7-5, 6-3 | | match details | ||
| 14.03.19 | 2nd round | Seongchan Hong | Sho Shimabukuro | 6-1, 7-64 | | match details | ||
| 13.03.19 | 1st round | Seongchan Hong | Gengo Kikuchi | 4-6, 6-3, 7-66 | | match details | ||
| 08.03.19 | 1/4 | Jumpei Yamasaki | Seongchan Hong | 3-6, 7-66, 6-2 | | match details | M15 Nishi | Hard |
| 08.03.19 | 2nd round | Seongchan Hong | Keisuke Saitoh | 6-3, 6-0 | | match details | ||
| 06.03.19 | 1st round | Seongchan Hong | Taketo Takamisawa | 4-6, 6-3, 6-3 | | match details | ||
| 02.01.19 | 1st round | Agustin Velotti | Seongchan Hong | 3-6, 6-0, 6-3 | | match details |  M25 Hong | Hard |
| 26.12.18 | 2nd round | Wishaya Trongcharoenchaikul | Seongchan Hong | 7-5, 7-5 | | match details | Hong Kong | Hard |
| 25.12.18 | 1st round | Seongchan Hong | Anthony Jackie Tang | 6-3, 7-5 | | match details | ||
| 07.11.18 | 2nd round | Antoine Bellier | Seongchan Hong | 6-64, Seongchan Hong - retired | | match details | Thailand F8 | Hard |
| 05.11.18 | 1st round | Seongchan Hong | Alexandar Lazarov | 6-4, 6-1 | | match details | ||
| 02.11.18 | 1/2 | Min-Kyu Song | Seongchan Hong | 6-2, 6-3 | | match details | Thailand F7 | Hard |
| 31.10.18 | 2nd round | Seongchan Hong | Bernardo Saraiva | 6-2, 6-4 | | match details | ||
| 31.10.18 | 1/4 | Seongchan Hong | Hiroyasu Ehara | 2-6, 6-4, 6-3 | | match details | ||
| 30.10.18 | 1st round | Seongchan Hong | Siddharth Vishwakarma | 7-64, 6-2 | | match details | ||
| 09.07.18 | 1st round | Ji Sung Nam | Seongchan Hong | 6-3, 6-3 | | match details | China F10 | Hard |
| 07.07.18 | 1/2 | Ji Hoon Son | Seongchan Hong | 7-65, 6-1 | | match details | China F9 | Hard |
| 06.07.18 | 1/4 | Seongchan Hong | Wei Qiang Zheng | 6-3, 6-1 | | match details | ||
| 03.07.18 | 2nd round | Seongchan Hong | Natthasith Kunsuwan | 6-3, 6-4 | | match details | ||
| 02.07.18 | 1st round | Seongchan Hong | Mitchell Thomas Mcdaniels | 5-2, Mitchell Thomas Mcdaniels - retired | | match details | ||
| 19.06.18 | 2nd round | Oh-Hee Kwon | Seongchan Hong | 7-5, 6-4 | | match details | Korea F3 | Hard |
| 18.06.18 | 1st round | Seongchan Hong | Seong-Gook Oh | 7-68, 6-0 | | match details | ||
| 14.06.18 | 2nd round | Seongchan Hong | Seong-Gook Oh | 6-73, 6-4, 3-1, Seong-Gook Oh - retired | | match details | Korea F2 | Hard |
| 14.06.18 | 1/4 | Ji Sung Nam | Seongchan Hong | 7-5, 6-3 | | match details | ||
| 13.06.18 | 1st round | Seongchan Hong | Daniel Yoo | 6-1, 3-6, Daniel Yoo - retired | | match details | ||
| 05.06.18 | 1st round | Young-Hoon Jeong | Seongchan Hong | 1-6, 6-3, 6-2 | | match details | Korea F1 | Hard |
| 15.05.18 | 1st round | John-Patrick Smith | Seongchan Hong | 6-2, 6-4 | | match details | Busan Challenger | Hard |
| 06.05.18 | q 2 | Tung-Lin Wu | Seongchan Hong | 6-4, 6-77, 6-2 | | match details | Gimcheon Challenger | Hard |
| 05.05.18 | q 1 | Seongchan Hong | Thomas Fancutt | 2-6, 7-5, 6-4 | | match details | ||
| 03.05.18 | 2nd round | Tatsuma Ito | Seongchan Hong | 7-5, 6-1 | | match details | Seoul Challenger | Hard |
| 30.04.18 | 1st round | Seongchan Hong | Yasutaka Uchiyama | 2-6, 6-4, 7-5 | | match details | ||
| 28.03.18 | 2nd round | Kuan-Yi Lee | Seongchan Hong | 6-1, 3-6, 6-4 | | match details | Japan F4 | Hard |
| 26.03.18 | 1st round | Seongchan Hong | Xin Gao | 6-3, 6-4 | | match details | ||
| 23.03.18 | fin | Seongchan Hong | Makoto Ochi | 7-62, 6-1 | | match details | Japan F3 | Hard |
| 22.03.18 | 1/4 | Seongchan Hong | Min-Kyu Song | 7-5, 7-63 | | match details | ||
| 22.03.18 | 1/2 | Seongchan Hong | Tatsuma Ito | 7-5, 2-6, 6-2 | | match details | ||
| 21.03.18 | 2nd round | Seongchan Hong | Shinji Hazawa | 7-62, 6-3 | | match details | ||
| 19.03.18 | 1st round | Seongchan Hong | Naoki Tajima | 6-1, 4-6, 6-4 | | match details | ||
| 16.03.18 | 1/4 | Kaichi Uchida | Seongchan Hong | 7-63, 1-6, 7-63 | | match details | Japan F2 | Hard |
| 14.03.18 | 2nd round | Seongchan Hong | Yunosuke Tanaka | 6-3, 6-3 | | match details | ||
| 12.03.18 | 1st round | Seongchan Hong | Shuichi Sekiguchi | 6-4, 1-6, 7-62 | | match details | ||
| 19.09.17 | 1st round | Luke Saville | Seongchan Hong | 2-6, 6-4, 7-62 | | match details | Gwangju Challenger | Hard |
| 13.06.17 | 1st round | Young Seok Kim | Seongchan Hong | 6-2, 6-4 | | match details | Korea F3 | Hard |
| 09.06.17 | 1/4 | Min-Kyu Song | Seongchan Hong | 6-3, 2-2, Seongchan Hong - retired | | match details | Korea F2 | Hard |
| 08.06.17 | 2nd round | Seongchan Hong | Oh-Hee Kwon | 7-65, 3-2, Oh-Hee Kwon - retired | | match details | ||
| 07.06.17 | 1st round | Seongchan Hong | Ju-Hae Moon | 6-3, 6-3 | | match details | ||
| 04.06.17 | fin | Daniel Nguyen | Seongchan Hong | 6-4, 5-7, 6-2 | | match details | Korea F1 | Hard |
| 03.06.17 | 1/2 | Seongchan Hong | Makoto Ochi | 6-1, 7-69 | | match details | ||
| 01.06.17 | 2nd round | Seongchan Hong | Jae-Won Choi | 6-3, 6-2 | | match details | ||
| 01.06.17 | 1/4 | Seongchan Hong | Sang-Woo Noh | 6-4, 6-2 | | match details | ||
| 30.05.17 | 1st round | Seongchan Hong | Dong-Kyu Lee | 6-1, 4-6, 6-4 | | match details | ||
| 16.05.17 | 1st round | Go Soeda | Seongchan Hong | 2-6, 6-3, 6-1 | | match details | Busan Challenger | Hard |
| 10.05.17 | 1st round | Austin Krajicek | Seongchan Hong | 7-614, 6-3 | | match details | Seoul Challenger | Hard |
| 02.05.17 | 1st round | Yuki Bhambri | Seongchan Hong | 6-3, 3-6, 6-4 | | match details | Gimcheon Challenger | Hard |
| 09.04.17 | Michael Venus | Seongchan Hong | 6-3, 3-6, 4-6, 6-2, 6-3 | | match details |  Davis Cup | Hard | |
| 07.04.17 | Rubber 1 | Jose Statham | Seongchan Hong | 3-6, 5-7, 7-66, 7-66, 2-0, Seongchan Hong - retired | | match details | ||
| 31.03.17 | 1/2 | Yusuke Takahashi | Seongchan Hong | 6-4, 7-5 | | match details | Japan F4 | Hard |
| 30.03.17 | 2nd round | Seongchan Hong | Gengo Kikuchi | 6-3, 6-3 | | match details | ||
| 30.03.17 | 1/4 | Seongchan Hong | Yosuke Watanuki | 7-5, 6-4 | | match details | ||
| 28.03.17 | 1st round | Seongchan Hong | Yuta Shimizu | 6-2, 7-62 | | match details | ||
| 27.02.17 | 1st round | Sarp Agabigun | Seongchan Hong | 1-6, 7-62, 7-5 | | match details | Turkey F8 | Hard |
| 24.02.17 | 1/4 | Cem Ilkel | Seongchan Hong | 6-73, 6-4, 7-5 | | match details | Turkey F7 | Hard |
| 23.02.17 | 2nd round | Seongchan Hong | Martins Podzus | 6-2, 7-5 | | match details | ||
| 21.02.17 | 1st round | Seongchan Hong | Maksim Tikhomirov | 6-1, 6-3 | | match details | ||
| 16.02.17 | 2nd round | Felipe Mantilla | Seongchan Hong | 6-2, 6-3 | | match details | Turkey F6 | Hard |
| 14.02.17 | 1st round | Seongchan Hong | Ivan Davydov | 6-3, 6-0 | | match details | ||
| 09.01.17 | qual. | Jimmy Wang | Seongchan Hong | 2-6, 6-4, 6-4 | | match details | Bangkok Challenger | Hard |
| 08.01.17 | q 2 | Seongchan Hong | Sidharth Rawat | 6-4, 6-0 | | match details | ||
| 01.01.17 | q 2 | Jurgen Zopp | Seongchan Hong | 6-4, 6-77, 7-5 | | match details | Bangkok Challenger | Hard |
| 31.12.16 | q 1 | Seongchan Hong | Ti Chen | 6-2, 6-75, 6-3 | | match details | ||
| 19.09.16 | 1st round | Soichiro Moritani | Seongchan Hong | 6-76, 6-4, 6-4 | | match details |  Vietnam F5 | Hard |
| 13.09.16 | 1st round | Joel Cannell | Seongchan Hong | 1-6, 6-4, 4-1, Seongchan Hong - retired | | match details | Vietnam F4 | Hard |
| 07.09.16 | 1/4 | Yusuke Takahashi | Seongchan Hong | 6-4, 6-0 | | match details | Thailand F3 | Hard |
| 06.09.16 | 1st round | Seongchan Hong | Ryota Tanuma | 6-3, 7-66 | | match details | ||
| 06.09.16 | 2nd round | Seongchan Hong | Zhaoyi Cao | 6-1, 6-4 | | match details | ||
| 03.09.16 | fin | N.Sriram Balaji | Seongchan Hong | 6-4, 7-63 | | match details | Thailand F2 | Hard |
| 01.09.16 | 1/4 | Seongchan Hong | Renta Tokuda | 6-1, 6-4 | | match details | ||
| 01.09.16 | 1/2 | Seongchan Hong | N. Vijay Sundar Prashanth | 6-4, 7-60 | | match details | ||
| 31.08.16 | 2nd round | Seongchan Hong | Yuanfeng Li | 6-0, 6-3 | | match details | ||
| 30.08.16 | 1st round | Seongchan Hong | Joan Soler | 7-64, 6-2 | | match details | ||
| 14.08.16 | fin | Seongchan Hong | Jacob Grills | 6-1, 6-74, 6-0 | | match details | Vietnam F3 | Hard |
| 13.08.16 | 1/2 | Seongchan Hong | Jonathan Kanar | 2-6, 6-2, 2-0, Jonathan Kanar - retired | | match details | ||
| 11.08.16 | 1/4 | Seongchan Hong | Yuichi Ito | 6-3, 4-1, Yuichi Ito - retired | | match details | ||
| 10.08.16 | 2nd round | Seongchan Hong | Rishab Agarwal | 4-6, 6-3, 6-2 | | match details | ||
| 09.08.16 | 1st round | Seongchan Hong | Mukund Sasikumar | 7-5, 6-4 | | match details | ||
| 05.08.16 | 1/4 | Christopher Rungkat | Seongchan Hong | 4-6, 6-2, 6-3 | | match details | Vietnam F2 | Hard |
| 04.08.16 | 2nd round | Seongchan Hong | Yuichi Ito | 4-6, 7-5, 6-4 | | match details | ||
| 02.08.16 | 1st round | Seongchan Hong | Masaki Sasai | 6-1, 6-1 | | match details | ||
| 31.07.16 | fin | Seongchan Hong | Rishab Agarwal | 6-1, 6-2 | | match details | Vietnam F1 | Hard |
| 30.07.16 | 1/2 | Seongchan Hong | Mukund Sasikumar | 6-0, 6-2 | | match details | ||
| 29.07.16 | 1/4 | Seongchan Hong | Christopher Rungkat | 6-4, 6-3 | | match details | ||
| 28.07.16 | 2nd round | Seongchan Hong | Nam Hoang Ly | 6-2, 5-7, 6-1 | | match details | ||
| 27.07.16 | 1st round | Seongchan Hong | Kittiphong Wachiramanowong | 6-0, 6-3 | | match details | ||
| 27.06.16 | 1st round | Hyun-Woo Nam | Seongchan Hong | 6-1, 3-0, Seongchan Hong - retired | | match details | Korea F3 | Hard |
| 25.06.16 | 1/2 | Sang-Woo Noh | Seongchan Hong | 1-6, 6-1, 6-1 | | match details | Korea F2 | Hard |
| 24.06.16 | 1/4 | Seongchan Hong | Yunseong Chung | 7-62, 6-71, 6-4 | | match details | ||
| 22.06.16 | 2nd round | Seongchan Hong | Min-Kyu Song | 6-2, 7-64 | | match details | ||
| 20.06.16 | 1st round | Seongchan Hong | Jea Moon Lee | 6-1, 4-2, Jea Moon Lee - retired | | match details | ||
| 15.06.16 | 2nd round | Yong-Kyu Lim | Seongchan Hong | 7-5, 7-5 | | match details | Korea F1 | Hard |
| 15.06.16 | 1st round | Seongchan Hong | Connor Farren | 6-2, 6-1 | | match details | ||
| 10.05.16 | 1st round | Tatsuma Ito | Seongchan Hong | 6-4, 6-2 | | match details | Seoul Challenger | Hard |
| 02.05.16 | 1st round | Lukas Lacko | Seongchan Hong | 4-6, 6-4, 6-2 | | match details | Busan Challenger | Hard |
| 12.04.16 | 1st round | Di Wu | Seongchan Hong | 6-75, 6-4, 6-2 | | match details | Gwangju Challenger | Hard |
| 04.03.16 | Rubber 1 | Seongchan Hong | Jose Statham | 6-4, 6-3, 4-6, 7-66 | | match details | Davis Cup | Hard |
| 21.02.16 | fin | Seongchan Hong | Dimitar Kuzmanov | 6-4, 6-3 | | match details | Turkey F7 | Hard |
| 20.02.16 | 1/2 | Seongchan Hong | Frederico Ferreira Silva | 6-2, 1-6, 7-65 | | match details | ||
| 19.02.16 | 1/4 | Seongchan Hong | Yong-Kyu Lim | 6-2, 6-1 | | match details | ||
| 18.02.16 | 2nd round | Seongchan Hong | Alexander Bublik | 6-2, 6-2 | | match details | ||
| 16.02.16 | 1st round | Seongchan Hong | Lukas Mugevicius | 6-2, 6-4 | | match details | ||
| 14.02.16 | fin | Seongchan Hong | Frederico Ferreira Silva | 7-5, 6-4 | | match details | Turkey F6 | Hard |
| 13.02.16 | 1/2 | Seongchan Hong | Roman Safiullin | 6-2, 6-2 | | match details | ||
| 12.02.16 | 1/4 | Seongchan Hong | Issei Okamura | 5-7, 6-4, 6-3 | | match details | ||
| 11.02.16 | 2nd round | Seongchan Hong | Barkin Yalcinkale | 6-1, 6-2 | | match details | ||
| 10.02.16 | 1st round | Seongchan Hong | Moos Sporken | 6-1, 6-1 | | match details | ||
| 07.02.16 | fin | Seongchan Hong | Roman Safiullin | 6-2, 7-5 | | match details | Turkey F5 | Hard |
| 06.02.16 | 1/2 | Seongchan Hong | Bar Tzuf Botzer | 2-6, 6-4, 6-1 | | match details | ||
| 05.02.16 | 1/4 | Seongchan Hong | Lukas Mugevicius | 6-1, 6-1 | | match details | ||
| 04.02.16 | 2nd round | Seongchan Hong | Yannik Reuter | 6-3, 3-0, Yannik Reuter - retired | | match details | ||
| 03.02.16 | 1st round | Seongchan Hong | Philip Wilbert Major | 6-0, 6-3 | | match details | ||
| 31.01.16 | fin | Joris De Loore | Seongchan Hong | 6-4, 6-2 | | match details | Turkey F4 | Hard |
| 30.01.16 | 1/2 | Seongchan Hong | Hiroyasu Ehara | 6-3, 7-65 | | match details | ||
| 29.01.16 | 1/4 | Seongchan Hong | Pascal Brunner | 6-1, 6-2 | | match details | ||
| 28.01.16 | 2nd round | Seongchan Hong | Roman Safiullin | 6-3, 6-2 | | match details | ||
| 27.01.16 | 1st round | Seongchan Hong | Riccardo Bellotti | 6-1, 6-4 | | match details | ||
| 14.12.15 | 1st round | Seongchan Hong | Haadin Bava | 7-63, 6-3 | | match details |  Qatar F6 | Hard |
| 14.12.15 | 2nd round | Scott Clayton | Seongchan Hong | 4-6, 6-3, 6-3 | | match details | ||
| 07.12.15 | 2nd round | Seongchan Hong | Markos Kalovelonis | 6-2, 6-3 | | match details | Qatar F5 | Hard |
| 07.12.15 | 1/4 | Seongchan Hong | Jonny O'Mara | 6-3, 6-2 | | match details | ||
| 07.12.15 | fin | Joris De Loore | Seongchan Hong | 6-3, 6-2 | | match details | ||
| 07.12.15 | 1/2 | Seongchan Hong | Luke Bambridge | 6-0, 4-6, 6-3 | | match details | ||
| 07.12.15 | 1st round | Seongchan Hong | Alexander Ward | 6-2, 4-6, 6-4 | | match details | ||
| 30.11.15 | 1/4 | Luke Bambridge | Seongchan Hong | 6-74, 6-4, 6-2 | | match details | Qatar F4 | Hard |
| 30.11.15 | 1st round | Seongchan Hong | Roberto Marcora | 6-4, 6-2 | | match details | ||
| 30.11.15 | 2nd round | Seongchan Hong | Ameur Ben Hassen | 6-1, 7-5 | | match details | ||
| 11.09.15 | 1/4 | Tommy Paul | Seongchan Hong | 2-6, 7-5, 6-1 | | match details | U.S. Open | Hard |
| 09.09.15 | 3rd round | Seongchan Hong | Lloyd Harris | 6-3, 6-4 | | match details | ||
| 08.09.15 | 2nd round | Seongchan Hong | Andrea Pellegrino | 6-3, 6-1 | | match details | ||
| 07.09.15 | 1st round | Seongchan Hong | Juan Pablo Ficovich | 6-1, 6-3 | | match details | ||
| 24.08.15 | 2nd round | Seongchan Hong | Jung-Woong Na | 7-69, 1-6, 6-4 | | match details | Korea F5 | Hard |
| 24.08.15 | 1/4 | Ji Sung Nam | Seongchan Hong | 6-2, 6-2 | | match details | ||
| 24.08.15 | 1st round | Seongchan Hong | Dae-Soung Oh | 4-6, 6-4, 7-5 | | match details | ||
| 17.08.15 | 2nd round | Dong-Whee Choi | Seongchan Hong | 2-6, 6-2, 6-0 | | match details | Korea F4 | Hard |
| 17.08.15 | 1st round | Seongchan Hong | Dae-Soung Oh | 6-0, 6-2 | | match details | ||
| 10.08.15 | 1/2 | Jung-Woong Na | Seongchan Hong | 6-4, 6-2 | | match details | Korea F3 | Hard |
| 10.08.15 | 1/4 | Seongchan Hong | Jae-Won Choi | 6-3, 6-3 | | match details | ||
| 10.08.15 | 1st round | Seongchan Hong | Ju-Hae Moon | 6-3, 6-4 | | match details | ||
| 10.08.15 | 2nd round | Seongchan Hong | Ji Sung Nam | 4-6, 6-2, 6-4 | | match details | ||
| 18.05.15 | 1st round | Daniel Nguyen | Seongchan Hong | 4-6, 6-4, 6-1 | | match details | Korea F1 | Hard |
| 10.05.15 | q 2 | Marcos Giron | Seongchan Hong | 6-0, 6-3 | | match details | Seoul Challenger | Hard |
| 09.05.15 | q 1 | Seongchan Hong | Yusuke Watanuki | 7-69, 6-1 | | match details | ||
| 05.05.15 | 1st round | Yen-Hsun Lu | Seongchan Hong | 6-3, 6-4 | | match details | Busan Challenger | Hard |
| 30.03.15 | q 1 | Seongchan Hong | Daiki Kondo | 6-3, 6-3 | | match details | Japan F4 | Hard |
| 30.03.15 | q 2 | Seongchan Hong | Issei Okamura | 6-3, 6-3 | | match details | ||
| 30.03.15 | 2nd round | Zhe Li | Seongchan Hong | 2-6, 6-4, 7-5 | | match details | ||
| 30.03.15 | qual. | Seongchan Hong | Yuto Sakai | 6-1, 6-0 | | match details | ||
| 30.03.15 | 1st round | Seongchan Hong | Kittiphong Wachiramanowong | 6-1, 6-3 | | match details | ||
| 23.03.15 | 2nd round | Yong-Kyu Lim | Seongchan Hong | 6-2, 4-6, 6-4 | | match details | Japan F3 | Hard |
| 23.03.15 | 1st round | Seongchan Hong | Kento Takeuchi | 6-1, 6-2 | | match details | ||
| 31.01.15 | fin | Roman Safiullin | Seongchan Hong | 7-5, 7-62 | | match details | Australian Open | Hard |
| 30.01.15 | 1/2 | Seongchan Hong | Akira Santillan | 6-2, 7-62 | | match details | ||
| 29.01.15 | 1/4 | Seongchan Hong | Taylor Harry Fritz | 6-74, 7-64, 6-0 | | match details | ||
| 28.01.15 | 3rd round | Seongchan Hong | Bogdan Bobrov | 6-1, 6-0 | | match details | ||
| 27.01.15 | 2nd round | Seongchan Hong | Sora Fukuda | 6-3, 6-4 | | match details | ||
| 25.01.15 | 1st round | Seongchan Hong | Alex De Minaur | 7-5, 5-7, 8-6 | | match details | ||
| 04.09.14 | 3rd round | Stefan Kozlov | Seongchan Hong | 6-3, 2-6, 6-3 | | match details | U.S. Open | Hard |
| 03.09.14 | 2nd round | Seongchan Hong | Reilly Opelka | 6-3, 5-7, 6-4 | | match details | ||
| 01.09.14 | 1st round | Seongchan Hong | Andrea Pellegrino | 6-1, 6-1 | | match details | ||
| 28.04.14 | q 2 | Seongchan Hong | Atsushi Ushida | 6-4, 6-3 | | match details | Korea F2 | Hard |
| 28.04.14 | 1st round | Ji Sung Nam | Seongchan Hong | 6-0, 6-2 | | match details | ||
| 28.04.14 | qual. | Hong Chung | Seongchan Hong | 6-0, 6-3 | | match details | ||
| 28.04.14 | q 1 | Seongchan Hong | Seunghun Shin | 6-2, 5-7, 6-1 | | match details | ||
| 21.04.14 | q 1 | Kittiphong Wachiramanowong | Seongchan Hong | 6-4, 6-4 | | match details | Korea F1 | Hard |
| 21.01.14 | 2nd round | Andrey Rublev | Seongchan Hong | 4-6, 6-2, 6-4 | | match details | Australian Open | Hard |
| 18.01.14 | 1st round | Seongchan Hong | Yusuke Takahashi | 6-3, 6-4 | | match details | ||
| 01.09.13 | 1st round | Clement Geens | Seongchan Hong | 2-6, 7-67, 6-4 | | match details | U.S. Open | Hard |
| 20.05.13 | q 1 | Min-Seok Song | Seongchan Hong | 6-1, 6-2 | | match details | Korea F3 | Hard |
| 13.05.13 | qual. | Jose Statham | Seongchan Hong | 6-3, 6-1 | | match details | Busan Challenger | Hard |
| 12.05.13 | q 2 | Seongchan Hong | Adrien Bossel | 6-3, 5-7, 6-4 | | match details | ||
| 11.05.13 | q 1 | Seongchan Hong | Yunseong Chung | 6-4, 6-4 | | match details | ||
| 06.05.13 | 1st round | Seongchan Hong | Jae Hwan Kim | 4-6, 6-3, 6-2 | | match details | Korea F2 | Hard |
| 06.05.13 | 2nd round | Enrique Lopez-Perez | Seongchan Hong | 6-4, 6-4 | | match details | ||
| 20.01.13 | 1st round | Omar Jasika | Seongchan Hong | 3-6, 6-4, 6-1 | | match details | Australian Open | Hard |
