Round: 1
| Bulgaria Liga Pro | 2021/08/17 18:30 | Dmitriy Volkov v Mihail Minchenkov | 2-6,3-6 |
| Bulgaria Liga Pro | 2021/08/17 17:00 | Mihail Minchenkov v Dmitriy Volkov | 6-0,6-3 |
| Bulgaria Liga Pro | 2021/08/14 18:30 | Mikhail Gusev v Mihail Minchenkov | 6-1,5-7,8-10 |
| Bulgaria Liga Pro | 2021/08/14 17:00 | Mihail Minchenkov v Mikhail Gusev | 6-3,6-4 |
| Bulgaria Liga Pro | 2021/08/10 18:30 | Mihail Minchenkov v Mikhail Gusev | 6-4,6-0 |
| Bulgaria Liga Pro | 2021/08/10 17:00 | Mikhail Gusev v Mihail Minchenkov | 6-4,0-6,10-7 |
| Bulgaria Liga Pro | 2021/08/08 18:30 | Mihail Minchenkov v Anton Kondrashov | 3-6,6-3,10-4 |
| Bulgaria Liga Pro | 2021/08/08 17:00 | Anton Kondrashov v Mihail Minchenkov | 4-6,4-6 |
| 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 | 2021/08/07 18:30 | Konstantin Kromin v Dmitriy Volkov | 6-7,7-6,7-10 |
| Bulgaria Liga Pro | 2021/08/07 17:00 | Dmitriy Volkov v Konstantin Kromin | 6-4,7-6 |
| Bulgaria Liga Pro | 2021/08/05 18:30 | Konstantin Kromin v Rodion Khodor | 6-4,6-1 |
| Bulgaria Liga Pro | 2021/08/05 17:00 | Rodion Khodor v Konstantin Kromin | 6-7,3-6 |
| Bulgaria Liga Pro | 2021/08/03 18:30 | Konstantin Kromin v Dmitriy Volkov | 1-6,0-6 |
| Bulgaria Liga Pro | 2021/08/03 17:00 | Dmitriy Volkov v Konstantin Kromin | 4-6,6-2,10-2 |