Name: Stefan Kozlov
Country: USA
Birthdate: 01.02.98, 27 years
ATP ranking: 488
TOP ranking's position: 103 (18.07.22, 533 points)
Points: 86
Prize money: 1.026.233 $
Matches total: 613
Win: 350
%: 57.1 %
Country: USA
Birthdate: 01.02.98, 27 years
ATP ranking: 488
TOP ranking's position: 103 (18.07.22, 533 points)
Points: 86
Prize money: 1.026.233 $
Matches total: 613
Win: 350
%: 57.1 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2025 | 9/5 | 2/3 | 3/0 | 4/2 | 0/0 | 0/0 | 0/0 |
| 2024 | 37/20 | 16/9 | 17/8 | 4/3 | 0/0 | 0/0 | 0/0 |
| 2023 | 6/12 | 1/6 | 0/0 | 5/6 | 0/0 | 0/0 | 0/0 |
| 2022 | 21/34 | 14/18 | 0/5 | 4/5 | 0/0 | 3/6 | 0/0 |
| 2021 | 41/15 | 20/12 | 5/2 | 16/1 | 0/0 | 0/0 | 0/0 |
| 2020 | 13/13 | 7/8 | 0/0 | 6/5 | 0/0 | 0/0 | 0/0 |
| 2019 | 22/18 | 14/9 | 4/4 | 4/5 | 0/0 | 0/0 | 0/0 |
| 2018 | 13/26 | 4/12 | 7/6 | 1/4 | 0/0 | 1/4 | 0/0 |
| 2017 | 31/29 | 15/14 | 8/8 | 3/2 | 0/0 | 5/5 | 0/0 |
| 2016 | 58/31 | 28/15 | 10/6 | 16/5 | 0/0 | 4/5 | 0/0 |
| 2015 | 44/27 | 15/12 | 10/5 | 17/8 | 0/0 | 2/2 | 0/0 |
| 2014 | 33/19 | 23/12 | 5/4 | 0/2 | 0/0 | 5/1 | 0/0 |
| 2013 | 17/11 | 3/3 | 11/6 | 0/0 | 0/0 | 3/2 | 0/0 |
| 2012 | 5/3 | 4/2 | 0/0 | 0/0 | 0/0 | 1/1 | 0/0 |
| TOTAL | 350/263 | 166/135 | 80/54 | 80/48 | 0/0 | 24/26 | 0/0 |
| perc. % | 57.1 % | 55.15 % | 59.7 % | 62.5 % | 0 % | 48 % | 0 % |
Stefan Kozlov / Fixtures
| no matches found |
Stefan Kozlov form / surface: Grass
Stefan Kozlov / surface: Grass
| 11.07.22 | 1st round | Steve Johnson | Stefan Kozlov | 7-5, 6-3 |  | match details |  Newport | Grass |
| 28.06.22 | 1st round | Diego Sebastian Schwartzman | Stefan Kozlov | 6-3, 6-2, 6-2 | | match details |  London | Grass |
| 23.06.22 | qual. | Dennis Novak | Stefan Kozlov | 7-5, 6-4, 5-7, 3-6, 6-3 | | match details | ||
| 22.06.22 | q 2 | Stefan Kozlov | Dominic Stricker | 7-69, 4-6, 6-3 |  | match details | ||
| 20.06.22 | q 1 | Stefan Kozlov | Evan Furness | 7-5, 6-3 | | match details | ||
| 11.06.22 | q 1 | Steve Johnson | Stefan Kozlov | 6-0, 6-0 | | match details | London | Grass |
| 04.06.22 | q 1 | Matthew Ebden | Stefan Kozlov | 6-4, 6-4 | | match details |  's-Hertogenbosch | Grass |
| 02.06.22 | 2nd round | Brandon Nakashima | Stefan Kozlov | 6-4, 6-3 | | match details | Surbiton Challenger | Grass |
| 01.06.22 | 1st round | Stefan Kozlov | Mats Moraing | 6-3, 7-64 | | match details | ||
| 26.06.18 | q 2 | Yannick Maden | Stefan Kozlov | 6-1, 6-3 | | match details | Wimbledon | Grass |
| 25.06.18 | q 1 | Stefan Kozlov | Dustin Brown | 6-3, 6-1 | | match details | ||
| 17.06.18 | q 1 | Brydan Klein | Stefan Kozlov | 4-6, 6-1, 7-5 | | match details | Ilkley Challenger | Grass |
| 12.06.18 | 1st round | Christopher Eubanks | Stefan Kozlov | 6-3, 6-3 | | match details | Nottingham Challenger | Grass |
| 02.06.18 | q 1 | Daniel Evans | Stefan Kozlov | 6-1, 6-0 | | match details | Surbiton Challenger | Grass |
| 17.07.17 | 1st round | Adrian Menendez-Maceiras | Stefan Kozlov | 6-2, 7-65 | | match details | Newport | Grass |
| 28.06.17 | q 2 | Dennis Novikov | Stefan Kozlov | 7-5, 6-2 | | match details | London | Grass |
| 26.06.17 | q 1 | Stefan Kozlov | Marc Polmans | 6-4, 7-5 | | match details | ||
| 22.06.17 | 2nd round | Marin Cilic | Stefan Kozlov | 6-0, 6-4 | | match details | London | Grass |
| 20.06.17 | 1st round | Stefan Kozlov | Steve Johnson | 3-6, 6-1, 6-1 | | match details | ||
| 18.06.17 | qual. | Stefan Kozlov | Pierre-Hugues Herbert | 6-4, 6-2 | | match details | ||
| 17.06.17 | q 1 | Stefan Kozlov | Kenny de Schepper | 6-74, 6-3, 6-4 | | match details | ||
| 15.06.17 | 2nd round | Ivo Karlovic | Stefan Kozlov | 6-4, 6-1 | | match details | 's-Hertogenbosch | Grass |
| 13.06.17 | 1st round | Stefan Kozlov | Dustin Brown | 6-3, 3-6, 6-3 | | match details | ||
| 08.06.17 | 1st round | Akira Santillan | Stefan Kozlov | 6-2, 2-6, 6-3 | | match details | Surbiton Challenger | Grass |
| 13.07.16 | 2nd round | Donald Young | Stefan Kozlov | 6-0, 6-4 | | match details | Newport | Grass |
| 12.07.16 | 1st round | Stefan Kozlov | Benjamin Becker | 6-1, 6-2 | | match details | ||
| 21.06.16 | q 1 | Daniil Medvedev | Stefan Kozlov | 6-2, 6-2 | | match details | London | Grass |
| 11.06.16 | q 1 | Vasek Pospisil | Stefan Kozlov | 7-65, 7-66 | | match details | London | Grass |
| 10.06.16 | 1/4 | Sam Querrey | Stefan Kozlov | 6-3, 6-0 | | match details | 's-Hertogenbosch | Grass |
| 08.06.16 | 2nd round | Stefan Kozlov | Steve Johnson | 6-3, 6-4 | | match details | ||
| 06.06.16 | 1st round | Stefan Kozlov | Yoshihito Nishioka | 6-1, 2-6, 6-3 | | match details | ||
| 02.06.16 | 2nd round | Denis Kudla | Stefan Kozlov | 6-4, 6-3 | | match details | Manchester Challenger | Grass |
| 01.06.16 | 1st round | Stefan Kozlov | Adrien Bossel | 6-4, 6-4 | | match details | ||
| 13.06.15 | q 1 | Daniel Brands | Stefan Kozlov | 6-2, 6-4 | | match details | Ilkley Challenger | Grass |
| 07.06.15 | qual. | Frederik Nielsen | Stefan Kozlov | 6-2, 4-6, 6-3 | | match details | Surbiton Challenger | Grass |
| 06.06.15 | q 2 | Stefan Kozlov | Sean Thornley | 3-6, 6-3, 6-4 | | match details | ||
| 06.06.15 | q 1 | Stefan Kozlov | Purav Raja | 2-6, 6-4, 6-2 | | match details | ||
| 06.07.14 | fin | Noah Rubin | Stefan Kozlov | 6-4, 4-6, 6-3 | | match details | Wimbledon (juniors) | Grass |
| 05.07.14 | 1/2 | Stefan Kozlov | Johan Sebastien Tatlot | 6-3, 7-67 | | match details | ||
| 04.07.14 | 1/4 | Stefan Kozlov | Hyeon Chung | 6-4, 7-66 | | match details | ||
| 03.07.14 | 3rd round | Stefan Kozlov | Naoki Nakagawa | 6-3, 7-62 | | match details | ||
| 02.07.14 | 2nd round | Stefan Kozlov | Pedro Martinez Portero | 6-0, 6-2 | | match details | ||
| 01.07.14 | 1st round | Stefan Kozlov | Rafael Matos | 6-4, 6-1 | | match details | ||
| 08.07.13 | 1st round | Michal Przysiezny | Stefan Kozlov | 6-3, 6-79, 6-4 | | match details | Newport | Grass |
| 04.07.13 | 1/4 | Kyle Edmund | Stefan Kozlov | 4-6, 6-1, 6-3 | | match details | Wimbledon (juniors) | Grass |
| 03.07.13 | 3rd round | Stefan Kozlov | Alexander Zverev | 1-6, 6-4, 4-0, Alexander Zverev - retired | | match details | ||
| 02.07.13 | 2nd round | Stefan Kozlov | Lucas Gomez | 6-2, 6-3 | | match details | ||
| 01.07.13 | 1st round | Stefan Kozlov | Joshua Sapwell | 6-3, 6-3 | | match details | ||
| 03.07.12 | 2nd round | Liam Broady | Stefan Kozlov | 6-73, 6-0, 6-4 | | match details | Wimbledon (juniors) | Grass |
| 02.07.12 | 1st round | Stefan Kozlov | Daniel Masur | 5-7, 6-2, 6-1 | | match details |
