| 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 |
| UTR Pro Tennis Series California | 2021/05/20 15:00 | Joshua Ortlip v Alex Kuperstein | 6-1,5-3 |
| UTR Pro Tennis Series California | 2021/07/27 16:30 | Luke Vandecasteele v Dzianis Zharyn | 6-7,6-0,5-4 |
| UTR Pro Tennis Series California | 2021/07/26 18:00 | Joshua Charlton v Dzianis Zharyn | 6-1,6-2 |
| UTR Pro Tennis Series California | 2021/07/25 21:00 | Lucas Gomez v Dzianis Zharyn | 6-3,6-2 |
| ITF M15 Novomoskovsk | 2021/06/03 16:00 | Oleg Prihodko v Dzianis Zharyn | 6-2,6-1 |
| ITF M15 Novomoskovsk | 2021/05/31 10:00 | Leyton Rivera v Dzianis Zharyn | 6-7,2-6 |
| ITF M15 Novomoskovsk | 2021/05/31 06:15 | Dzianis Zharyn v Michal Mikula | 6-3,7-6 |
| ITF M15 Novomoskovsk | 2021/05/24 12:00 | Gabriel Donev v Dzianis Zharyn | 7-6,6-7,10-6 |
| ITF M15 Heraklion | 2020/02/17 11:00 | Nicolas Tepmahc v Dzianis Zharyn | 6-4,6-2 |