| TT Cup | 2021/06/23 13:35 | Kovalov, Oleksandr v Riabukhin, Anton | L | 0-3 |
| TT Cup | 2021/06/11 17:00 | Riabukhin, Anton v Kovalov, Oleksandr | L | 3-2 |
| TT Cup | 2021/06/11 13:30 | Riabukhin, Anton v Kovalov, Oleksandr | W | 1-3 |
| TT Cup | 2021/04/28 18:15 | Riabukhin, Anton v Kovalov, Oleksandr | L | 3-1 |
| TT Cup | 2021/04/27 20:05 | Riabukhin, Anton v Kovalov, Oleksandr | L | 3-1 |
| TT Cup | 2021/04/27 18:15 | Kovalov, Oleksandr v Riabukhin, Anton | L | 2-3 |
| TT Cup | 2021/04/25 11:50 | Riabukhin, Anton v Kovalov, Oleksandr | L | 3-1 |
| TT Cup | 2021/04/24 07:45 | Kovalov, Oleksandr v Riabukhin, Anton | L | 1-3 |
| TT Cup | 2021/06/23 14:50 | Vovk, Vitalii v Kovalov, Oleksandr | L | 3-1 |
| TT Cup | 2021/06/23 14:15 | Vakulenko, Denis v Kovalov, Oleksandr | W | 1-3 |
| TT Cup | 2021/06/23 13:35 | Kovalov, Oleksandr v Riabukhin, Anton | L | 0-3 |
| TT Cup | 2021/06/15 10:40 | Alekseenko, Dmytro v Kovalov, Oleksandr | W | 2-3 |
| TT Cup | 2021/06/15 10:05 | Kovalov, Oleksandr v Alekseenko, Dmytro | L | 2-3 |
| TT Cup | 2021/06/15 08:55 | Andrii Datsenko v Kovalov, Oleksandr | L | 3-1 |
| TT Cup | 2021/06/15 07:10 | Nemchenko, D. v Kovalov, Oleksandr | W | 0-3 |
| TT Cup | 2021/06/15 05:25 | Sukovatiy, Igor v Kovalov, Oleksandr | L | 3-0 |
| TT Cup | 2021/06/23 14:45 | Vakulenko, Denis v Riabukhin, Anton | W | 0-3 |
| TT Cup | 2021/06/23 14:10 | Vovk, Vitalii v Riabukhin, Anton | L | 3-0 |
| TT Cup | 2021/06/23 13:35 | Kovalov, Oleksandr v Riabukhin, Anton | W | 0-3 |
| TT Cup | 2021/06/17 16:30 | Riabukhin, Anton v Vakulenko, Denis | W | 3-0 |
| TT Cup | 2021/06/17 15:55 | Vovk, Vitalii v Riabukhin, Anton | L | 3-1 |
| TT Cup | 2021/06/17 15:25 | Riabukhin, Anton v Andrii Baklykov | L | 1-3 |
| TT Cup | 2021/06/17 14:15 | Riabukhin, Anton v Vakulenko, Denis | W | 3-2 |
| TT Cup | 2021/06/17 13:35 | Riabukhin, Anton v Simonchuk, David | W | 3-0 |