Round: 1
| Bulgaria Liga Pro | 2021/06/22 06:00 | Dmitriy Volkov v Mihail Minchenkov | 6-3,7-5 |
| Bulgaria Liga Pro | 2021/06/22 04:30 | Mihail Minchenkov v Dmitriy Volkov | 6-2,2-6,9-11 |
| Bulgaria Liga Pro | 2021/06/26 18:30 | Aleksandr Gorbachyov v Dmitriy Volkov | 6-0,6-1 |
| Bulgaria Liga Pro | 2021/06/26 17:00 | Dmitriy Volkov v Aleksandr Gorbachyov | 6-4,6-3 |
| Bulgaria Liga Pro | 2021/06/22 06:00 | Dmitriy Volkov v Mihail Minchenkov | 6-3,7-5 |
| Bulgaria Liga Pro | 2021/06/22 04:30 | Mihail Minchenkov v Dmitriy Volkov | 6-2,2-6,9-11 |
| Bulgaria Liga Pro | 2021/06/24 06:00 | Aleksandr Gorbachyov v Mihail Minchenkov | 3-6,5-7 |
| Bulgaria Liga Pro | 2021/06/24 04:30 | Mihail Minchenkov v Aleksandr Gorbachyov | 6-2,6-2 |
| Bulgaria Liga Pro | 2021/06/22 06:00 | Dmitriy Volkov v Mihail Minchenkov | 6-3,7-5 |
| Bulgaria Liga Pro | 2021/06/22 04:30 | Mihail Minchenkov v Dmitriy Volkov | 6-2,2-6,9-11 |