| 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 |
| UTR Pro Tennis Series California | 2021/05/20 15:00 | Joshua Ortlip v Alex Kuperstein | 6-1,5-3 |
| UTR Pro Tennis Series California | 2021/05/19 19:30 | Josh Sheehy v Alex Kuperstein | 6-3,6-5 |
| UTR Pro Tennis Series California | 2021/05/17 16:30 | R Seggerman v Alex Kuperstein | 3-6,4-6 |
| UTR Pro Tennis Series California | 2021/05/22 16:30 | Luis Humberto Lopez v Jackson Allen | 3-6,2-6 |
| UTR Pro Tennis Series California | 2021/05/20 16:30 | Jackson Allen v Sema Pankin | 0-6,6-3,3-5 |
| UTR Pro Tennis Series California | 2021/05/19 18:00 | Jackson Allen v Alexander Sarkissian | 6-7,3-5 |
| UTR Pro Tennis Series California | 2021/05/18 18:00 | Jackson Allen v Ante Pavic | 6-7,4-6 |
| UTR Pro Tennis Series California | 2021/05/17 19:30 | Jackson Allen v Lawee Sherif | 6-4,6-1 |