| UTR Pro Tennis Series California | 2021/11/09 17:30 | Rithvik Krishna v Alex Kuperstein | 6-4,3-6,0-5 |
| UTR Pro Tennis Series California | 2021/11/08 16:00 | Ray Lo v Alex Kuperstein | 6-2,6-2 |
| UTR Pro Tennis Series California | 2021/11/07 19:00 | Alex Kuperstein v Dzianis Zharyn | 7-6,5-2 |
| UTR Pro Tennis Series Beograd | 2021/07/10 11:30 | Alex Kuperstein v Jean Thirouin | 4-6,3-6 |
| UTR Pro Tennis Series Beograd | 2021/07/09 11:30 | Dusan Milanovic v Alex Kuperstein | 6-2,6-2 |
| UTR Pro Tennis Series Beograd | 2021/07/08 12:00 | Aleksei Khomich v Alex Kuperstein | 6-2,6-0 |
| UTR Pro Tennis Series Beograd | 2021/07/06 09:00 | Giacomo Revelli v Alex Kuperstein | 6-7,6-4,0-6 |
| UTR Pro Tennis Series Beograd | 2021/07/05 10:30 | Alex Kuperstein v Alexander Lazov | 6-4,7-5 |
| UTR Pro Tennis Series California | 2021/11/11 19:00 | Arthur Bellegy v Ethan Schiffman | 1-6,4-6 |
| UTR Pro Tennis Series California | 2021/11/10 16:00 | Ethan Schiffman v William Peters | 4-6,2-6 |
| UTR Pro Tennis Series California | 2021/11/08 17:30 | Ethan Schiffman v Jean Baptiste Badon | 6-3,5-0 |
| UTR Pro Tennis Series California | 2021/11/07 19:00 | Ethan Schiffman v Riccardo Roberto | 6-1,1-6,5-4 |
| UTR Pro Tennis Series California | 2021/09/02 16:30 | Ethan Schiffman v Jacob Bullard | 4-6,0-5 |
| UTR Pro Tennis Series California | 2021/09/01 21:00 | Errol Smith v Ethan Schiffman | 4-6,6-1,5-4 |
| UTR Pro Tennis Series California | 2021/08/31 16:30 | Wyatt DeMulling v Ethan Schiffman | 3-6,3-5 |
| UTR Pro Tennis Series California | 2021/08/30 19:30 | Fabien Salle v Ethan Schiffman | 7-5,6-2 |