Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF Serbia F4 | 2018/08/26 07:00 | Petar Pjevcevic v Petros Tsitsipas | 6-3,5-7,6-0 |
| ITF Serbia F3 | 2018/08/19 10:30 | Mile Matic v Petros Tsitsipas | 6-2,7-5 |
| Cupa Davis | 2018/04/07 08:00 | Petros Tsitsipas v Egor Matvievici | 6-1,6-1 |
| ITF Greece F5 | 2018/03/25 08:00 | Vlad Cristian Niculae v Petros Tsitsipas | 6-2,7-5 |
| ITF Greece F4 | 2018/03/20 08:00 | Petros Tsitsipas v Erik Crepaldi | 4-6,0-6 |
| ITF Greece F3 | 2018/03/10 07:30 | Michalis Sakellaridis v Petros Tsitsipas | 6-3,6-2 |
| ITF Greece F1 | 2018/02/28 08:30 | Petros Tsitsipas v Luke Johnson | 2-6,2-6 |
| Challenger - Quimper - Calificari | 2018/01/28 12:25 | Petros Tsitsipas v Tristan Lamasine | 3-6,1-6 |
| ITF France F16 | 2018/09/05 09:00 | Yannick Mertens v Gabriel Petit | 6-4,6-4 |
| ITF France F16 | 2018/09/03 15:00 | Gabriel Petit v Maxime Mora | 2-6,6-1,6-4 |
| ITF Ukraine F4 | 2018/08/29 11:45 | Gabriel Petit v Oleg Dolgosheyev | 7-6,2-6,3-6 |
| ITF Ukraine F4 | 2018/08/27 10:10 | Gabriel Petit v Georgii Kravchenko | 6-3,7-5 |
| ITF Belarus F2 | 2018/08/14 12:20 | Gabriel Petit v Daniil Klimov | 6-7,3-6 |
| ITF Indonesia F3 | 2018/08/07 03:45 | Gabriel Petit v Nitin Kumar Sinha | 6-3,3-6,4-6 |
| ITF Indonesia F2 | 2018/08/03 02:00 | Jeremy Beale v Gabriel Petit | 6-2,6-4 |
| ITF Indonesia F2 | 2018/08/02 05:20 | Quentin Robert v Gabriel Petit | 3-6,2-6 |