Stadium: Court 2 Round: 54 Ground: Clay
| ITF M15 - Poprad | 2021/07/04 08:00 | Illya Beloborodko v Piotr Pawlak | 6-0,6-7,10-6 |
| ITF M25 - Wroclaw | 2021/07/01 11:50 | Illya Beloborodko v Hernan Casanova | 2-6,1-6 |
| ITF M25 - Wroclaw | 2021/06/30 11:15 | Marco Bortolotti v Illya Beloborodko | 3-6,3-6 |
| ITF M25 - Wroclaw | 2021/06/29 08:00 | Daniel Siniakov v Illya Beloborodko | 6-4,4-6,6-10 |
| ITF M25 - Wroclaw | 2021/06/28 11:00 | Alessandro Procopio v Illya Beloborodko | 2-6,4-6 |
| ITF M25 - Wroclaw | 2021/06/27 15:30 | Daniel Paty v Illya Beloborodko | 4-6,4-6 |
| ITF M15 - Novomoskovsk | 2021/06/05 07:30 | Illya Beloborodko v Matias Zukas | 5-7,4-6 |
| ITF M15 - Novomoskovsk | 2021/06/04 14:20 | Yurii Dzhavakian v Illya Beloborodko | 3-6,5-7 |
| ITF M15 - Poprad | 2021/07/04 11:00 | Jakub Kroslak v Mateusz Terczynski | 6-2,6-7,9-11 |
| ITF M25 - Wroclaw | 2021/06/29 08:00 | Szymon Kielan v Mateusz Terczynski | 6-3,6-2 |
| ITF M25 - Wroclaw | 2021/06/28 11:00 | Mateusz Terczynski v Lukas Palovic | 6-3,6-1 |
| ITF M25 - Wroclaw | 2021/06/27 14:00 | Dominik Langmajer v Mateusz Terczynski | 1-6,3-6 |
| ITF M25 - Poznan | 2020/08/23 11:00 | Nikolas Lahky v Mateusz Terczynski | 6-4,2-6,10-6 |
| Polen - National Tour | 2020/07/16 13:05 | Mateusz Terczynski v Kamil Majchrzak | 1-6,1-6 |
| Polen - National Tour | 2020/07/07 10:30 | Mateusz Terczynski v Maciej Rajski | 0-6,0-6 |
| Marbello Cup Exhibition Series | 2020/06/05 07:00 | Mateusz Terczynski v Michal Dembek | 0-6,1-6 |