Round: 1
| Bulgaria Liga Pro | 2021/08/29 04:30 | Sergey Berezhnov v Dmitriy Volkov | 0-6,6-7 |
| Bulgaria Liga Pro | 2021/07/21 06:00 | Dmitriy Volkov v Sergey Berezhnov | 7-6,3-6,10-7 |
| Bulgaria Liga Pro | 2021/07/21 04:30 | Sergey Berezhnov v Dmitriy Volkov | 7-6,4-6,2-10 |
| Bulgaria Liga Pro | 2021/07/19 06:00 | Dmitriy Volkov v Sergey Berezhnov | 6-4,2-6,6-10 |
| Bulgaria Liga Pro | 2021/07/19 04:30 | Sergey Berezhnov v Dmitriy Volkov | 6-2,1-6,9-11 |
| Bulgaria Liga Pro | 2021/07/01 18:30 | Dmitriy Volkov v Sergey Berezhnov | 3-6,3-6 |
| Bulgaria Liga Pro | 2021/07/01 17:00 | Sergey Berezhnov v Dmitriy Volkov | 6-3,6-3 |
| Bulgaria Liga Pro | 2021/08/29 04:30 | Sergey Berezhnov v Dmitriy Volkov | 0-6,6-7 |
| Bulgaria Liga Pro | 2021/08/25 06:00 | Aleksandr Gorbachyov v Dmitriy Volkov | 6-2,4-6,5-10 |
| Bulgaria Liga Pro | 2021/08/25 04:30 | Dmitriy Volkov v Aleksandr Gorbachyov | 6-1,4-6,10-8 |
| Bulgaria Liga Pro | 2021/08/23 18:30 | Dmitriy Volkov v Mihail Minchenkov | 6-2,3-6,10-7 |
| Bulgaria Liga Pro | 2021/08/23 17:00 | Mihail Minchenkov v Dmitriy Volkov | 7-6,2-6,10-7 |
| Bulgaria Liga Pro | 2021/08/19 18:30 | Konstantin Kromin v Dmitriy Volkov | 4-6,4-6 |
| Bulgaria Liga Pro | 2021/08/19 17:00 | Dmitriy Volkov v Konstantin Kromin | 5-7,6-3,4-10 |
| Bulgaria Liga Pro | 2021/08/17 18:30 | Dmitriy Volkov v Mihail Minchenkov | 2-6,3-6 |
| Bulgaria Liga Pro | 2021/08/29 04:30 | Sergey Berezhnov v Dmitriy Volkov | 0-6,6-7 |
| Bulgaria Liga Pro | 2021/08/27 06:00 | Aleksandr Gorbachyov v Sergey Berezhnov | 2-6,3-6 |
| Bulgaria Liga Pro | 2021/08/27 04:30 | Sergey Berezhnov v Aleksandr Gorbachyov | 6-7,6-4,10-5 |
| Bulgaria Liga Pro | 2021/07/29 18:30 | Anton Kondrashov v Sergey Berezhnov | 3-6,3-6 |
| Bulgaria Liga Pro | 2021/07/29 17:00 | Sergey Berezhnov v Anton Kondrashov | 6-7,6-7 |
| Bulgaria Liga Pro | 2021/07/27 18:30 | Sergey Berezhnov v Anton Kondrashov | 4-6,6-0,11-9 |
| Bulgaria Liga Pro | 2021/07/27 17:00 | Anton Kondrashov v Sergey Berezhnov | 4-6,6-4,10-8 |
| Bulgaria Liga Pro | 2021/07/25 18:30 | Konstantin Kromin v Sergey Berezhnov | 2-6,1-6 |