| UTR Pro Tennis Series - Californien | 2021/11/13 16:00 | Alex Kuperstein v Ethan Schiffman | 6-0,6-2 |
| UTR Pro Tennis Series - Californien | 2021/11/09 17:30 | Rithvik Krishna v Alex Kuperstein | 6-4,3-6,0-5 |
| UTR Pro Tennis Series - Californien | 2021/11/08 16:00 | Ray Lo v Alex Kuperstein | 6-2,6-2 |
| UTR Pro Tennis Series - Californien | 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 - Californien | 2021/11/13 16:00 | Aadarsh Tripathi v Zdenek Derkas | 6-7,2-6 |
| UTR Pro Tennis Series - Californien | 2021/11/12 16:00 | Conrad Brown v Zdenek Derkas | 2-6,3-5 |
| UTR Pro Tennis Series - Californien | 2021/11/10 16:00 | Juan Carlos v Zdenek Derkas | 6-1,5-2 |
| UTR Pro Tennis Series - Californien | 2021/11/09 17:30 | Joe Tyler v Zdenek Derkas | 6-7,0-6 |
| UTR Pro Tennis Series - Californien | 2021/11/08 17:30 | Zdenek Derkas v Daniel Traxler | 6-0,6-0 |
| UTR Pro Tennis Series - Californien | 2021/10/11 15:00 | Zdenek Derkas v Kris Van Wyk | 0-0 |
| ITF M25 - Most | 2021/05/24 09:00 | Zdenek Derkas v Lucas Bouquet | 1-6,1-6 |
| ITF M25 - Most | 2021/05/23 14:00 | Leon Hoeveler v Zdenek Derkas | 4-6,1-6 |