| UTR Pro Tennis Series California | 2021/11/07 17:30 | Rithvik Krishna v Ray Lo | 6-7,6-6 |
| UTR Pro Tennis Series Dallas | 2021/09/05 13:00 | Ray Lo v Alejandro Moreno | 6-7,1-5 |
| UTR Pro Tennis Series Dallas | 2021/09/04 17:40 | Jacob Brumm v Ray Lo | 5-7,3-5 |
| UTR Pro Tennis Series Dallas | 2021/09/03 17:30 | Ray Lo v Ilgiz Valiev | 6-3,6-2 |
| UTR Pro Tennis Series Dallas | 2021/09/02 17:30 | Ray Lo v Evan Zhu | 5-7,3-6 |
| UTR Pro Tennis Series Dallas | 2021/08/31 17:00 | Orel Ovil v Ray Lo | 6-3,1-6,6-6 |
| 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 | 2021/05/22 15:00 | Eric Hadigian v Alex Kuperstein | 3-6,5-6 |
| UTR Pro Tennis Series California | 2021/05/21 20:45 | Alexander Stater v Alex Kuperstein | 6-2,3-6,2-6 |