Stadium: Court Central Round: 25 Ground: Clay
| Challenger Split | 2021/04/04 10:35 | Matteo Martineau v Matija Pecotic | 6-4,0-6,6-4 |
| Challenger Zadar | 2021/03/23 09:00 | Nikolas Sanchez Izquierdo v Matija Pecotic | 3-6,6-3,6-2 |
| Challenger Biella - Kval | 2021/03/14 13:35 | Daniel Masur v Matija Pecotic | 6-0,6-3 |
| Challenger St. Petersburg | 2021/03/09 08:20 | Jiri Lehecka v Matija Pecotic | 6-2,7-6 |
| Challenger St. Petersburg | 2021/03/08 07:00 | Alessandro Bega v Matija Pecotic | 3-6,3-6 |
| Challenger St. Petersburg - Kval | 2021/03/07 07:00 | Matija Pecotic v Uladzimir Ignatik | 0-6,7-6,6-4 |
| Challenger St. Petersburg | 2021/03/02 10:30 | Matija Pecotic v Andrey Kuznetsov | 6-7,2-6 |
| ITF M25 - Naples | 2021/02/25 17:10 | Alejandro Gonzalez v Matija Pecotic | 6-1,7-5 |
| ITF M15 - Bratislava | 2021/03/11 10:50 | Gabriel Petit v Michal Dembek | 3-6,3-6 |
| ITF M15 - Bratislava | 2021/03/10 13:30 | Gabriel Petit v Michal Novansky | 6-2,7-5 |
| ITF M15 - Bratislava | 2021/03/04 09:00 | Andrew Paulson v Gabriel Petit | 6-1,6-2 |
| ITF M15 - Bratislava | 2021/03/02 16:30 | Fabian Marozsan v Gabriel Petit | 6-7,4-6 |
| ITF - M15 - Monastir | 2021/02/12 11:00 | Tom Kocevar-Desman v Gabriel Petit | 7-6,6-1 |
| ITF - M15 - Monastir | 2021/02/11 09:35 | Alexander Kotzen v Gabriel Petit | 6-2,4-6,6-7 |
| ITF - M15 - Monastir | 2021/02/10 13:10 | Jean Thirouin v Gabriel Petit | 5-7,4-6 |
| ITF - M15 - Monastir | 2021/02/04 08:30 | Tom Kocevar-Desman v Gabriel Petit | 6-4,2-6,7-6 |