Name: Claudio Grassi
Country: Italy
Birthdate: 25.07.85, 39 years
ATP ranking: 870
TOP ranking's position: 300 (22.08.11, 152 points)
Points: 18
Prize money: 146.565 $
Matches total: 572
Win: 330
%: 57.69 %
Country: Italy
Birthdate: 25.07.85, 39 years
ATP ranking: 870
TOP ranking's position: 300 (22.08.11, 152 points)
Points: 18
Prize money: 146.565 $
Matches total: 572
Win: 330
%: 57.69 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2019 | 4/1 | 4/1 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2015 | 4/6 | 1/4 | 1/1 | 0/0 | 2/1 | 0/0 | 0/0 |
| 2014 | 20/22 | 14/12 | 6/8 | 0/2 | 0/0 | 0/0 | 0/0 |
| 2013 | 43/25 | 29/13 | 13/10 | 1/2 | 0/0 | 0/0 | 0/0 |
| 2012 | 54/28 | 24/9 | 24/14 | 3/4 | 3/1 | 0/0 | 0/0 |
| 2011 | 43/28 | 23/11 | 19/13 | 0/2 | 1/2 | 0/0 | 0/0 |
| 2010 | 35/23 | 23/6 | 6/11 | 3/2 | 3/4 | 0/0 | 0/0 |
| 2009 | 49/28 | 15/11 | 26/16 | 3/1 | 5/0 | 0/0 | 0/0 |
| 2008 | 45/32 | 17/10 | 28/22 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2007 | 17/20 | 12/10 | 5/10 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2006 | 12/19 | 8/13 | 1/2 | 0/0 | 2/2 | 1/2 | 0/0 |
| 2005 | 2/3 | 2/2 | 0/1 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2004 | 2/5 | 1/3 | 1/2 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2003 | 0/2 | 0/0 | 0/2 | 0/0 | 0/0 | 0/0 | 0/0 |
| TOTAL | 330/242 | 173/105 | 130/112 | 10/13 | 16/10 | 1/2 | 0/0 |
| perc. % | 57.69 % | 62.23 % | 53.72 % | 43.48 % | 61.54 % | 33.33 % | 0 % |
Claudio Grassi / Fixtures
| no matches found |
Claudio Grassi form / surface: Clay
Claudio Grassi / surface: Clay
| 10.01.15 | q 2 | Lorenzo Giustino | Claudio Grassi | 6-2, 4-6, 7-62 |  | match details |  Casablanca Challenger | Clay |
| 10.01.15 | q 1 | Claudio Grassi | Houssam Sbaii | 6-3, 6-0 |  | match details | ||
| 20.09.14 | q 1 | Ronald Slobodchikov | Claudio Grassi | Claudio Grassi - walk over | | match details | Kenitra Challenger | Clay |
| 13.09.14 | q 2 | Seydou Diallo | Claudio Grassi | 2-6, 6-4, 7-64 | | match details | Meknes Challenger | Clay |
| 01.09.14 | 1st round | Claudio Grassi | Marc Garcia-Roman | 7-5, 6-3 | | match details |  Tunisia F4 | Clay |
| 01.09.14 | 1/4 | Maxime Hamou | Claudio Grassi | 4-1, Claudio Grassi - retired | | match details | ||
| 01.09.14 | 2nd round | Claudio Grassi | Simo Rikalo | 6-1, 6-0 | | match details | ||
| 10.08.14 | q 2 | Omar Giacalone | Claudio Grassi | 3-6, 7-63, 6-3 | | match details |  Cordenons Challenger | Clay |
| 09.08.14 | q 1 | Claudio Grassi | Emin Agaev | 6-2, 6-3 | | match details | ||
| 29.06.14 | q 1 | Maximilian Neuchrist | Claudio Grassi | 7-64, 6-3 | | match details | Todi Challenger | Clay |
| 10.06.14 | 1st round | Pablo Cuevas | Claudio Grassi | 6-1, 6-3 | | match details | Caltanissetta Challenger | Clay |
| 08.06.14 | q 2 | Claudio Grassi | Andrea Basso | 6-3, 7-65 | | match details | ||
| 08.06.14 | qual. | Claudio Grassi | Walter Trusendi | 6-4, 2-6, 6-1 | | match details | ||
| 27.04.14 | q 2 | Adam Chadaj | Claudio Grassi | 3-6, 6-4, 7-5 | | match details |  Ostrava Challenger | Clay |
| 26.04.14 | q 1 | Claudio Grassi | Maxim Dubarenco | 6-4, 6-3 | | match details | ||
| 20.04.14 | q 1 | Lukas Jastraunig | Claudio Grassi | 4-6, 6-1, 7-61 | | match details | Vercelli Challenger | Clay |
| 28.10.13 | 1st round | Dominic Thiem | Claudio Grassi | 6-4, 6-3 | | match details | Casablanca Challenger | Clay |
| 27.10.13 | qual. | Claudio Grassi | Marco Bortolotti | 1-6, 6-4, 6-1 | | match details | ||
| 26.10.13 | q 2 | Claudio Grassi | Guy Orly Iradukunda | 6-0, 6-0 | | match details | ||
| 19.08.13 | 1/4 | Claudio Grassi | Alexander Jakupovic | 6-2, 6-4 | | match details |  Switzerland F5 | Clay |
| 19.08.13 | 1/2 | Roberto Marcora | Claudio Grassi | 6-76, 7-5, 6-3 | | match details | ||
| 19.08.13 | 1st round | Claudio Grassi | Riccardo Merone | 6-0, 6-0 | | match details | ||
| 19.08.13 | 2nd round | Claudio Grassi | Jacob Kahoun | 6-1, 6-4 | | match details | ||
| 12.08.13 | 1st round | Lorenzo Frigerio | Claudio Grassi | 6-2, 6-1 | | match details | Italy F21 | Clay |
| 24.06.13 | 1st round | Marco Speronello | Claudio Grassi | 7-65, 7-67 | | match details | Italy F13 | Clay |
| 17.06.13 | 1st round | Benjamin Balleret | Claudio Grassi | 6-1, 6-0 | | match details | Italy F14 | Clay |
| 13.05.13 | 1st round | Claudio Grassi | Mariano Esposito | 6-4, 6-4 | | match details | Italy F8 | Clay |
| 13.05.13 | 2nd round | Pietro Licciardi | Claudio Grassi | 6-0, Claudio Grassi - retired | | match details | ||
| 22.04.13 | 2nd round | Leandro Migani | Claudio Grassi | 6-2, 6-2 | | match details | Italy F5 | Clay |
| 22.04.13 | 1st round | Claudio Grassi | Walter Trusendi | 7-5, 6-4 | | match details | ||
| 15.04.13 | qual. | Ivan Endara | Claudio Grassi | 3-6, 6-3, 6-4 | | match details |  Panama City | Clay |
| 14.04.13 | q 2 | Claudio Grassi | Gaston Paz | 6-1, 6-3 | | match details | ||
| 13.04.13 | q 1 | Claudio Grassi | Luis Fernando Garcia | 6-2, 6-1 | | match details | ||
| 09.04.13 | 1st round | Diego Sebastian Schwartzman | Claudio Grassi | 6-73, 6-2, 6-2 | | match details |  Barranquilla Challenger | Clay |
| 08.04.13 | qual. | Claudio Grassi | Jorge Montero | 6-1, 6-2 | | match details | ||
| 07.04.13 | q 2 | Claudio Grassi | Felipe Rojas | 6-3, 6-4 | | match details | ||
| 25.03.13 | qual. | Ivan Endara | Claudio Grassi | 7-5, 6-2 | | match details | Pereira Challenger | Clay |
| 24.03.13 | q 2 | Claudio Grassi | Felipe Rojas | 6-2, 6-2 | | match details | ||
| 24.03.13 | q 1 | Claudio Grassi | Jhan Fontalvo Silva | 6-0, 6-0 | | match details | ||
| 10.09.12 | 1st round | Andrey Kuznetsov | Claudio Grassi | 6-2, 6-3 | | match details | Todi Challenger | Clay |
| 20.08.12 | 1st round | Marco Cecchinato | Claudio Grassi | 6-4, 6-3 | | match details | Italy F23 | Clay |
| 08.08.12 | 2nd round | Stephane Robert | Claudio Grassi | 6-3, 6-3 | | match details |  San Marino | Clay |
| 06.08.12 | 1st round | Claudio Grassi | Guillermo Hormazabal | 6-3, 7-62 | | match details | ||
| 05.08.12 | qual. | Claudio Grassi | Marco Cecchinato | 2-6, 6-1, 6-4 | | match details | ||
| 04.08.12 | q 1 | Claudio Grassi | Manuel Righi | 6-1, 6-2 | | match details | ||
| 04.08.12 | q 2 | Claudio Grassi | Andrea Grossi | 6-1, 6-0 | | match details | ||
| 23.07.12 | 1st round | Claudio Grassi | Manuel Mazzella | 6-1, 6-2 | | match details | Italy F19 | Clay |
| 23.07.12 | 1/4 | Miljan Zekic | Claudio Grassi | 6-2, 6-4 | | match details | ||
| 23.07.12 | 2nd round | Claudio Grassi | Lorenzo Papasidero | 4-6, 6-1, 6-3 | | match details | ||
| 12.07.12 | 2nd round | Victor Estrella | Claudio Grassi | 6-4, 6-1 | | match details | Bogota Challenger | Clay |
| 10.07.12 | 1st round | Claudio Grassi | Ricardo Hocevar | 3-6, 6-3, 6-4 | | match details | ||
| 03.07.12 | 1st round | Diego Junqueira | Claudio Grassi | 6-3, 6-2 | | match details |  Lima Challenger | Clay |
| 11.06.12 | 1st round | James Marsalek | Claudio Grassi | 6-3, 6-3 | | match details | Italy F13 | Clay |
| 04.06.12 | 1/2 | Andrea Arnaboldi | Claudio Grassi | 7-5, 6-2 | | match details | Italy F12 | Clay |
| 04.06.12 | 2nd round | Claudio Grassi | Amerigo Contini | 5-7, 6-3, 6-2 | | match details | ||
| 04.06.12 | 1/4 | Claudio Grassi | Matteo Trevisan | 6-4, 6-4 | | match details | ||
| 04.06.12 | 1st round | Claudio Grassi | Marco Speronello | 6-2, 6-3 | | match details | ||
| 14.05.12 | 1st round | Claudio Grassi | Francesco Carenza | 6-3, 6-0 | | match details | Italy F9 | Clay |
| 14.05.12 | 2nd round | Claudio Grassi | Federico Torresi | 6-1, 7-5 | | match details | ||
| 14.05.12 | 1/4 | Moritz Baumann | Claudio Grassi | 6-3, 6-4 | | match details | ||
| 07.05.12 | 2nd round | Claudio Grassi | Massimo Capone | 6-4, 6-4 | | match details | Italy F8 | Clay |
| 07.05.12 | fin | Luca Vanni | Claudio Grassi | 6-4, 6-3 | | match details | ||
| 07.05.12 | 1/4 | Claudio Grassi | Filip Peliwo | 6-3, 4-6, 6-2 | | match details | ||
| 07.05.12 | 1/2 | Claudio Grassi | Moritz Baumann | 6-4, 6-3 | | match details | ||
| 07.05.12 | 1st round | Claudio Grassi | Sami Reinwein | 6-4, 6-4 | | match details | ||
| 30.04.12 | 1/4 | Alberto Brizzi | Claudio Grassi | 6-2, 6-0 | | match details | Italy F7 | Clay |
| 30.04.12 | 1st round | Claudio Grassi | Riccardo Sinicropi | 6-3, 6-2 | | match details | ||
| 30.04.12 | 2nd round | Claudio Grassi | Marco Cecchinato | 6-2, 6-3 | | match details | ||
| 16.04.12 | 2nd round | Alex Bolt | Claudio Grassi | 6-3, 3-6, 6-3 | | match details | Italy F5 | Clay |
| 16.04.12 | 1st round | Claudio Grassi | Maverick Banes | 6-4, 3-6, 6-4 | | match details | ||
| 09.04.12 | 2nd round | Claudio Grassi | Luca Vanni | 6-4, 6-1 | | match details | Italy F4 | Clay |
| 09.04.12 | 1/2 | Michael Linzer | Claudio Grassi | 6-3, 6-4 | | match details | ||
| 09.04.12 | 1/4 | Claudio Grassi | Daniel Smethurst | 7-5, 6-1 | | match details | ||
| 09.04.12 | 1st round | Claudio Grassi | Marcus Daniell | 3-2, Marcus Daniell - retired | | match details | ||
| 02.04.12 | 1/4 | Nick van der Meer | Claudio Grassi | 6-2, 7-5 | | match details | Italy F3 | Clay |
| 02.04.12 | 1st round | Claudio Grassi | Matteo Fago | 5-7, 7-5, 6-3 | | match details | ||
| 02.04.12 | 2nd round | Claudio Grassi | Omar Giacalone | 6-2, 6-75, 6-3 | | match details | ||
| 27.09.11 | 1st round | Juan-Sebastian Cabal | Claudio Grassi | 6-2, 7-5 | | match details |  Aguascalenties Challenger | Clay |
| 08.08.11 | fin | Claudio Grassi | Pierre-Hugues Herbert | 6-3, 6-4 | | match details |  Latvia F1 | Clay |
| 08.08.11 | 2nd round | Claudio Grassi | Pierre Bonfre | 4-6, 6-1, 7-5 | | match details | ||
| 08.08.11 | 1/4 | Claudio Grassi | Roberto Marcora | 7-63, 6-4 | | match details | ||
| 08.08.11 | 1/2 | Claudio Grassi | Dzmitry Zhyrmont | 5-7, 7-5, 6-1 | | match details | ||
| 08.08.11 | 1st round | Claudio Grassi | Arturs Kazijevs | 6-4, 7-5 | | match details | ||
| 01.08.11 | 1st round | Claudio Grassi | Niccolo Mugelli | 4-6, 6-3, 6-3 | | match details | Italy F21 | Clay |
| 01.08.11 | 2nd round | Marco Viola | Claudio Grassi | 6-3, 7-65 | | match details | ||
| 25.07.11 | 1st round | Claudio Grassi | Thomas Le Boulch | 7-5, 6-2 | | match details |  Turkey F21 | Clay |
| 25.07.11 | 2nd round | Jerome Inzerillo | Claudio Grassi | 7-63, 2-6, 7-5 | | match details | ||
| 18.07.11 | 1st round | Claudio Grassi | Francesco Borgo | 4-6, 6-3, 6-4 | | match details | Turkey F20 | Clay |
| 18.07.11 | 2nd round | Claudio Grassi | Valentin Dimov | 4-6, 6-3, 6-1 | | match details | ||
| 18.07.11 | 1/4 | Alexander Jakupovic | Claudio Grassi | 6-2, 6-2 | | match details | ||
| 11.07.11 | 1st round | Claudio Grassi | Federico Margini | 6-1, 6-3 | | match details | Italy F18 | Clay |
| 11.07.11 | 2nd round | Francesco Borgo | Claudio Grassi | 3-6, 6-3, 6-4 | | match details | ||
| 20.06.11 | 1st round | Claudio Grassi | Alexander Zhurbin | 7-63, 6-3 | | match details | Italy F15 | Clay |
| 20.06.11 | 1/2 | Alessandro Giannessi | Claudio Grassi | 6-2, 6-3 | | match details | ||
| 20.06.11 | 2nd round | Claudio Grassi | Giulio Torroni | 7-5, 6-2 | | match details | ||
| 20.06.11 | 1/4 | Claudio Grassi | Thales Turini | 5-7, 6-2, 6-2 | | match details | ||
| 30.05.11 | 1/4 | Christian Lindell | Claudio Grassi | 7-5, 6-3 | | match details | Italy F12 | Clay |
| 30.05.11 | 1st round | Claudio Grassi | Nikolai Haessig | 6-2, 6-4 | | match details | ||
| 30.05.11 | 2nd round | Claudio Grassi | Enrico Fioravante | 6-0, 2-6, 6-4 | | match details | ||
| 23.05.11 | 1st round | Dusan Lajovic | Claudio Grassi | 6-2, 5-7, 7-5 | | match details | Italy F11 | Clay |
| 09.05.11 | 1st round | Claudio Grassi | Matwe Middelkoop | 6-4, 6-3 | | match details | Italy F9 | Clay |
| 09.05.11 | 2nd round | Claudio Grassi | Alejandro Fabbri | 6-4, 6-4 | | match details | ||
| 09.05.11 | 1/4 | Antal Van Der Duim | Claudio Grassi | 6-0, 7-5 | | match details | ||
| 02.05.11 | 1st round | Yann Marti | Claudio Grassi | 4-6, 6-2, 6-2 | | match details | Italy F8 | Clay |
| 25.04.11 | 1st round | Claudio Grassi | Oliver Golding | 4-6, 6-2, 7-62 | | match details |  Great Britain | Clay |
| 25.04.11 | 2nd round | Enrico Burzi | Claudio Grassi | 6-4, 6-3 | | match details | ||
| 18.04.11 | 1st round | Yannick Mertens | Claudio Grassi | 6-0, 6-0 | | match details | Italy F6 | Clay |
| 04.04.11 | qual. | Kenny de Schepper | Claudio Grassi | 6-2, 6-0 | | match details | Monza Challenger | Clay |
| 04.04.11 | q 2 | Claudio Grassi | Marco Bortolotti | 6-1, 6-2 | | match details | ||
| 09.08.10 | 1st round | Miljan Zekic | Claudio Grassi | 6-3, 6-3 | | match details |  Serbia F5 | Clay |
| 02.08.10 | 1st round | Claudio Grassi | Roberto Marcora | 6-2, 6-4 | | match details | Italy F20 | Clay |
| 02.08.10 | 2nd round | Alessandro Colella | Claudio Grassi | 7-5, 6-3 | | match details | ||
| 26.07.10 | 1st round | Florian Reynet | Claudio Grassi | 7-5, 6-2 | | match details | Italy F19 | Clay |
| 12.07.10 | 1st round | Pavol Cervenak | Claudio Grassi | 6-3, 6-4 | | match details | Italy F17 | Clay |
| 24.05.10 | 1st round | Gerald Kamitz | Claudio Grassi | 7-68, 3-6, 6-2 | | match details |  Slovenia F1 | Clay |
| 17.05.10 | 1st round | Paul-Mihai Puscasu | Claudio Grassi | 6-4, 1-6, 6-3 | | match details |  Romania F1 | Clay |
| 03.05.10 | 1st round | Claudio Grassi | Neil Pauffley | 6-2, 6-4 | | match details | Great Britain | Clay |
| 03.05.10 | 2nd round | Claudio Grassi | Jack Carpenter | 6-2, 6-4 | | match details | ||
| 03.05.10 | 1/4 | Claudio Grassi | Alexander Ward | 6-4, 6-3 | | match details | ||
| 03.05.10 | 1/2 | Mathieu Rodrigues | Claudio Grassi | 6-0, 5-7, 7-62 | | match details | ||
| 26.04.10 | 2nd round | Mikhail Vasiliev | Claudio Grassi | 5-7, 6-1, 7-5 | | match details | Great Britain | Clay |
| 26.04.10 | 1st round | Claudio Grassi | Daniel Glancy | 6-4, 6-3 | | match details | ||
| 05.04.10 | q 2 | Benjamin Balleret | Claudio Grassi | 6-0, 6-3 | | match details | Monza Challenger | Clay |
| 05.04.10 | q 1 | Claudio Grassi | Cristian Villagran | 6-2, 6-3 | | match details | ||
| 29.03.10 | 1st round | Hans Podlipnik-Castillo | Claudio Grassi | 7-64, 6-0 | | match details |  Croatia F3 | Clay |
| 18.01.10 | 1st round | Christopher Diaz-Figueroa | Claudio Grassi | 3-6, 2-1, Claudio Grassi - retired | | match details |  El Salvador | Clay |
| 31.08.09 | 1/2 | Claudio Grassi | Laurynas Grigelis | 6-1, 7-5 | | match details | Italy F26 | Clay |
| 31.08.09 | 1st round | Claudio Grassi | Robin Kern | 6-1, 6-0 | | match details | ||
| 31.08.09 | fin | Daniele Giorgini | Claudio Grassi | 4-6, 6-1, 6-1 | | match details | ||
| 31.08.09 | 2nd round | Claudio Grassi | Deni Zmak | 6-2, 6-1 | | match details | ||
| 31.08.09 | 1/4 | Claudio Grassi | Herbert Wiltschnig | 4-6, 7-5, 6-3 | | match details | ||
| 17.08.09 | 2nd round | Andrei Plotniy | Claudio Grassi | 7-66, 7-61 | | match details | Serbia F7 | Clay |
| 17.08.09 | 1st round | Claudio Grassi | Nikola Cacic | 6-3, 1-0, Nikola Cacic - retired | | match details | ||
| 10.08.09 | 1st round | Francesco Piccari | Claudio Grassi | 7-64, 3-6, 7-5 | | match details | Italy F23 | Clay |
| 27.07.09 | 1st round | Claudio Grassi | Matteo Mauri | 6-4, 7-5 | | match details | Italy F21 | Clay |
| 27.07.09 | 1/4 | Filippo Leonardi | Claudio Grassi | 6-3, 2-6, 6-3 | | match details | ||
| 27.07.09 | 2nd round | Claudio Grassi | Antonio Comporto | 6-1, 7-60 | | match details | ||
| 13.07.09 | 1st round | Alessandro Giannessi | Claudio Grassi | 6-3, 6-4 | | match details | Italy F19 | Clay |
| 06.07.09 | q 1 | Claudio Grassi | Daniele Giuliani | 6-75, 6-0, 6-4 | | match details | San Benedetto | Clay |
| 06.07.09 | q 2 | Adriano Biasella | Claudio Grassi | 6-1, 6-4 | | match details | ||
| 29.06.09 | 2nd round | Deni Zmak | Claudio Grassi | 6-4, 7-5 | | match details | Italy F17 | Clay |
| 29.06.09 | 1st round | Claudio Grassi | Stefano Travaglia | 1-6, 6-4, 7-5 | | match details | ||
| 01.06.09 | 1st round | Claudio Grassi | Dimitar Grabul | 6-4, 3-6, 6-3 | | match details | Tunisia F1 | Clay |
| 01.06.09 | 1/4 | Malek Jaziri | Claudio Grassi | 3-6, 6-3, 6-4 | | match details | ||
| 01.06.09 | 2nd round | Claudio Grassi | Gilles de Sousa | 6-0, 3-6, 6-4 | | match details | ||
| 25.05.09 | 1st round | Claudio Grassi | Davide Della Tommasina | 6-2, 6-3 | | match details | Italy F12 | Clay |
| 25.05.09 | 2nd round | Leandro Migani | Claudio Grassi | 6-4, 5-7, 6-1 | | match details | ||
| 04.05.09 | 1st round | Claudio Grassi | Colin O'Brien | 6-1, 7-62 | | match details | Great Britain | Clay |
| 04.05.09 | 2nd round | Agustin Boje-Ordonez | Claudio Grassi | 6-3, 5-3, Claudio Grassi - retired | | match details | ||
| 27.04.09 | 2nd round | Claudio Grassi | David Rice | 4-6, 6-1, 6-0 | | match details | Great Britain | Clay |
| 27.04.09 | 1/4 | Ignacio Coll-Riudavets | Claudio Grassi | 5-7, 6-4, 7-5 | | match details | ||
| 27.04.09 | 1st round | Claudio Grassi | Nick Cavaday | 7-63, 6-75, 6-0 | | match details | ||
| 30.03.09 | 1st round | Claudio Grassi | Juan-Pablo Villar | 6-4, 6-4 | | match details | Italy F5 | Clay |
| 30.03.09 | 2nd round | Victor Ionita | Claudio Grassi | 6-1, 6-1 | | match details | ||
| 23.03.09 | 1st round | Claudio Grassi | Rodrigo-Antonio Grilli | 6-4, 5-7, 7-5 | | match details | Italy F4 | Clay |
| 23.03.09 | 2nd round | Walter Trusendi | Claudio Grassi | 6-1, 6-2 | | match details | ||
| 16.03.09 | 1st round | Claudio Grassi | Francesco Vilardo | 6-0, 6-4 | | match details | Italy F3 | Clay |
| 16.03.09 | 2nd round | Claudio Grassi | Massimo Capone | 6-0, 6-4 | | match details | ||
| 16.03.09 | 1/4 | Tim Goransson | Claudio Grassi | 6-3, 1-6, 6-4 | | match details | ||
| 09.02.09 | 1/2 | Claudio Grassi | Gonzalo Tur | 6-1, 6-2 | | match details | Panama F1 | Clay |
| 09.02.09 | 1st round | Claudio Grassi | Rafael Camilo | 3-4, Rafael Camilo - retired | | match details | ||
| 09.02.09 | fin | Rafael Arevalo | Claudio Grassi | 7-5, 6-2 | | match details | ||
| 09.02.09 | 2nd round | Claudio Grassi | Gregory Ouellette | 4-6, 6-3, 6-4 | | match details | ||
| 09.02.09 | 1/4 | Claudio Grassi | Giulio Torroni | 7-5, Giulio Torroni - retired | | match details | ||
| 19.01.09 | 1/4 | Claudio Grassi | Gaston-Arturo Grimolizzi | 2-6, 7-5, 6-3 | | match details | El Salvador | Clay |
| 19.01.09 | 1/2 | Lars Poerschke | Claudio Grassi | 7-5, 3-6, 6-3 | | match details | ||
| 19.01.09 | 1st round | Claudio Grassi | Christopher Racz | 6-0, 6-2 | | match details | ||
| 19.01.09 | 2nd round | Claudio Grassi | Jorge Montero | 6-4, 7-5 | | match details | ||
| 10.11.08 | 1/4 | Riccardo Ghedin | Claudio Grassi | 6-1, 7-65 | | match details | Mexico F16 | Clay |
| 10.11.08 | 2nd round | Claudio Grassi | Timothy Bradshaw | 6-2, 6-0 | | match details | ||
| 10.11.08 | 1st round | Claudio Grassi | Jose Carlos Gutierrez Pliego | 6-3, 6-1 | | match details | ||
| 03.11.08 | 1st round | Claudio Grassi | German Sanchez Delfin | 7-61, 6-1 | | match details | Mexico F15 | Clay |
| 03.11.08 | 2nd round | Claudio Grassi | Petar Jelenic | 7-5, 6-2 | | match details | ||
| 03.11.08 | 1/4 | Carlos Palencia | Claudio Grassi | 6-3, 4-6, 6-4 | | match details | ||
| 29.09.08 | 1st round | Pedro Clar-Rossello | Claudio Grassi | 6-1, 7-65 | | match details | Italy F33 | Clay |
| 22.09.08 | q 2 | Nick van der Meer | Claudio Grassi | 6-4, 6-2 | | match details | Napoli | Clay |
| 22.09.08 | q 1 | Claudio Grassi | Leonardo Azzaro | 7-5, 3-6, 6-2 | | match details | ||
| 16.09.08 | 1st round | Paolo Lorenzi | Claudio Grassi | 6-1, 7-5 | | match details | Todi | Clay |
| 01.09.08 | 2nd round | Claudio Grassi | Fabio Tenneriello | 6-3, 6-1 | | match details | Italy F29 | Clay |
| 01.09.08 | 1/4 | Claudio Grassi | Peter Steinberger | 6-3, 6-4 | | match details | ||
| 01.09.08 | 1/2 | Reda El Amrani | Claudio Grassi | 6-3, 6-1 | | match details | ||
| 01.09.08 | 1st round | Claudio Grassi | Gaetano Marrone | 6-2, 6-3 | | match details | ||
| 25.08.08 | 1st round | Claudio Grassi | Vasek Pospisil | 6-2, 7-65 | | match details | Serbia F6 | Clay |
| 25.08.08 | 1/4 | Petar Popovic | Claudio Grassi | 6-2, 6-4 | | match details | ||
| 25.08.08 | 2nd round | Claudio Grassi | Nikola Cacic | 6-2, 6-0 | | match details | ||
| 18.08.08 | 1st round | Claudio Grassi | Borislav Borovic | 6-3, 6-4 | | match details | Serbia F5 | Clay |
| 18.08.08 | fin | Attila Balazs | Claudio Grassi | 6-4, 6-3 | | match details | ||
| 18.08.08 | 2nd round | Claudio Grassi | Stefan Bojic | 6-0, 6-4 | | match details | ||
| 18.08.08 | 1/4 | Claudio Grassi | Damiano di Ienno | 6-2, 6-0 | | match details | ||
| 18.08.08 | 1/2 | Claudio Grassi | Aleksander Slovic | 6-2, 1-6, 6-4 | | match details | ||
| 04.08.08 | 1st round | Christoffer Konigsfeldt | Claudio Grassi | 2-6, 7-64, 6-4 | | match details |  Lithuania F1 | Clay |
| 28.07.08 | 1st round | Claudio Grassi | Massimo Capone | 6-74, 6-3, 7-5 | | match details | Italy F24 | Clay |
| 28.07.08 | 1/4 | Davide Bramanti | Claudio Grassi | 7-67, 6-3 | | match details | ||
| 28.07.08 | 2nd round | Claudio Grassi | Filippo Leonardi | 6-4, 7-65 | | match details | ||
| 15.07.08 | 1st round | Lamine Ouahab | Claudio Grassi | 6-4, 6-3 | | match details | Rimini | Clay |
| 14.07.08 | qual. | Claudio Grassi | Luca Vanni | 6-2, 6-2 | | match details | ||
| 14.07.08 | q 1 | Claudio Grassi | Diego Zonzini | 6-1, 6-1 | | match details | ||
| 14.07.08 | q 2 | Claudio Grassi | Kamil Capkovic | 4-6, 7-63, 7-5 | | match details | ||
| 07.07.08 | 1st round | Claudio Grassi | Marco Speronello | 6-1, 6-0 | | match details | Italy F21 | Clay |
| 07.07.08 | 2nd round | Guillermo Olaso | Claudio Grassi | 6-1, 6-1 | | match details | ||
| 30.06.08 | 1st round | Claudio Grassi | Matt Fox | 7-67, 6-3 | | match details | Morocco F5 | Clay |
| 30.06.08 | 1/4 | Cesar Ferrer-Victoria | Claudio Grassi | 6-3, 3-6, 6-3 | | match details | ||
| 30.06.08 | 2nd round | Claudio Grassi | Miguel Almeida | 6-2, 6-3 | | match details | ||
| 23.06.08 | 1st round | Claudio Grassi | Germain Gigounon | 6-2, 7-5 | | match details | Morocco F4 | Clay |
| 23.06.08 | 2nd round | Roman Vogeli | Claudio Grassi | 6-3, 6-1 | | match details | ||
| 09.06.08 | 1st round | Claudio Grassi | Stephane Piro | 7-63, 6-2 | | match details | Tunisia F1 | Clay |
| 09.06.08 | 2nd round | Claudio Grassi | Nick Trkulja | 6-4, 6-3 | | match details | ||
| 09.06.08 | 1/4 | Robin Roshardt | Claudio Grassi | 6-2, 6-0 | | match details | ||
| 02.06.08 | 2nd round | Claudio Grassi | Matt Simpson | 6-3, 6-1 | | match details | Italy F16 | Clay |
| 02.06.08 | 1/4 | Francesco Piccari | Claudio Grassi | 7-5, 6-3 | | match details | ||
| 02.06.08 | 1st round | Claudio Grassi | Carlos Avellan | 6-3, 6-2 | | match details | ||
| 12.05.08 | 1st round | Josip Juric | Claudio Grassi | 2-6, 7-5, 6-4 | | match details |  Bosnia/Herzegovina F2 | Clay |
| 28.04.08 | 1st round | Victor Ionita | Claudio Grassi | 6-3, 6-4 | | match details | Romania F1 | Clay |
| 31.03.08 | 1st round | Antonio Pastorino | Claudio Grassi | 6-1, 6-3 | | match details | Italy F7 | Clay |
| 24.03.08 | 2nd round | Antonio Pastorino | Claudio Grassi | 6-3, 6-2 | | match details | Italy F6 | Clay |
| 24.03.08 | 1st round | Claudio Grassi | Giorgio Portaluri | 6-4, 6-2 | | match details | ||
| 25.02.08 | 1st round | Giulio di Meo | Claudio Grassi | 6-4, 6-3 | | match details | Italy F3 | Clay |
| 28.01.08 | 1st round | Raian Luchici | Claudio Grassi | 6-4, 6-2 | | match details | Panama F1 | Clay |
| 10.09.07 | q 1 | Photos Kallias | Claudio Grassi | 6-2, 6-1 | | match details | Todi | Clay |
| 03.09.07 | 1st round | Vladimir Obradovic | Claudio Grassi | 6-3, 6-2 | | match details | Croatia F9 | Clay |
| 27.08.07 | 1st round | Damiano di Ienno | Claudio Grassi | 6-2, 7-5 | | match details | Croatia F8 | Clay |
| 20.08.07 | 1st round | Claudio Grassi | Gregor Repina | 6-0, 6-3 | | match details | Croatia F7 | Clay |
| 20.08.07 | 2nd round | Claudio Grassi | Mikhail Vasiliev | 1-6, 7-64, 6-2 | | match details | ||
| 20.08.07 | 1/4 | Albert Loncaric | Claudio Grassi | 6-3, 6-3 | | match details | ||
| 06.08.07 | 1st round | Reda El Amrani | Claudio Grassi | 6-3, 6-3 | | match details | Italy F26 | Clay |
| 18.06.07 | 1st round | Luca Vanni | Claudio Grassi | 6-4, 6-3 | | match details | Italy F19 | Clay |
| 11.06.07 | 2nd round | Marco di Vuolo | Claudio Grassi | 6-3, 6-2 | | match details | Italy F18 | Clay |
| 11.06.07 | 1st round | Claudio Grassi | Hans Podlipnik-Castillo | 6-3, 6-1 | | match details | ||
| 04.06.07 | 1st round | Francesco Piccari | Claudio Grassi | 6-2, 6-4 | | match details | Italy F17 | Clay |
| 14.05.07 | 1st round | Claudio Grassi | Vedran Begovic | 6-4, 6-2 | | match details | Bosnia/Herzegovina F2 | Clay |
| 14.05.07 | 2nd round | Claudio Grassi | Valery Rudnev | 6-77, 7-65, 6-2 | | match details | ||
| 14.05.07 | 1/4 | Photos Kallias | Claudio Grassi | 6-4, 3-6, 6-1 | | match details | ||
| 22.01.07 | 1st round | Matias Saenz | Claudio Grassi | 6-2, 7-5 | | match details | Panama F1 | Clay |
| 19.06.06 | 1st round | Alexander Jakupovic | Claudio Grassi | 1-6, 7-62, 6-1 | | match details |  Ireland F1 | Clay |
| 19.06.06 | 1st round | Alexander Jakupovic | Claudio Grassi | 1-6, 7-62, 6-1 | | match details | ||
| 06.03.06 | 2nd round | Leonardo Azzaro | Claudio Grassi | 6-3, 6-3 | | match details | Italy F4 | Clay |
| 06.03.06 | 1st round | Claudio Grassi | Pablo Andujar | 1-6, 7-5, 6-4 | | match details | ||
| 25.07.05 | 1st round | Enrico Wellenfeld | Claudio Grassi | 6-1, 6-1 | | match details | Italy F23 | Clay |
| 26.07.04 | 2nd round | Giancarlo Petrazzuolo | Claudio Grassi | 6-2, 6-2 | | match details | Italy F18 | Clay |
| 26.07.04 | 1st round | Claudio Grassi | Gregorio Sgarlato | 6-2, 7-5 | | match details | ||
| 05.07.04 | 1st round | Mikhail Vasiliev | Claudio Grassi | 6-0, 6-3 | | match details | Italy F15 | Clay |
| 04.08.03 | q 1 | Jerome Haehnel | Claudio Grassi | 6-0, 6-0 | | match details | San Marino | Clay |
| 23.06.03 | q 1 | Giancarlo Petrazzuolo | Claudio Grassi | 6-1, 6-1 | | match details | Reggio Emilia | Clay |
