| UTR Pro Tennis Series Belgrad | 2021/07/09 11:30 | Dusan Milanovic v Alex Kuperstein | 6-2,6-2 |
| UTR Pro Tennis Series Belgrad | 2021/07/08 12:00 | Aleksei Khomich v Alex Kuperstein | 6-2,6-0 |
| UTR Pro Tennis Series Belgrad | 2021/07/06 09:00 | Giacomo Revelli v Alex Kuperstein | 6-7,6-4,0-6 |
| UTR Pro Tennis Series Belgrad | 2021/07/05 10:30 | Alex Kuperstein v Alexander Lazov | 6-4,7-5 |
| UTR Pro Tennis Series - Kalifornia | 2021/05/22 15:00 | Eric Hadigian v Alex Kuperstein | 3-6,5-6 |
| UTR Pro Tennis Series - Kalifornia | 2021/05/21 20:45 | Alexander Stater v Alex Kuperstein | 6-2,3-6,2-6 |
| UTR Pro Tennis Series - Kalifornia | 2021/05/20 15:00 | Joshua Ortlip v Alex Kuperstein | 6-1,5-3 |
| UTR Pro Tennis Series - Kalifornia | 2021/05/19 19:30 | Josh Sheehy v Alex Kuperstein | 6-3,6-5 |
| UTR Pro Tennis Series Belgrad | 2021/07/08 10:30 | Jean Thirouin v Viktor Jovic | 6-2,6-4 |
| UTR Pro Tennis Series Belgrad | 2021/07/07 12:00 | Jean Thirouin v Aleksa Mardjonovic | 6-4,6-2 |
| UTR Pro Tennis Series Belgrad | 2021/07/06 07:30 | Jean Thirouin v Yaraslav Shyla | 1-6,1-5 |
| UTR Pro Tennis Series Belgrad | 2021/07/05 09:00 | Jean Thirouin v Stefan Latinov | 6-3,7-6 |
| ITF - Grasse M25 | 2021/06/16 10:00 | Alvaro Lopez San Martin v Jean Thirouin | 6-1,6-1 |
| ITF - Skopje M15 | 2021/06/10 08:25 | Jean Thirouin v Tomas Jirousek | 1-6,3-6 |
| ITF - Skopje M15 | 2021/06/01 14:05 | Jean Thirouin v Dalibor Svrcina | 3-6,6-7 |
| ITF - Most M25 | 2021/05/25 09:35 | Alexander Erler v Jean Thirouin | 7-5,7-6 |