| Bulgaria Liga Pro | 2021/10/15 06:00 | Andrei Smirnov v Andrey Kapustin | 6-3,3-6,11-9 |
| Bulgaria Liga Pro | 2021/10/15 04:30 | Andrey Kapustin v Andrei Smirnov | 2-6,6-4,10-12 |
| Bulgaria Liga Pro | 2021/10/11 06:00 | Andrey Kapustin v Andrei Smirnov | 6-3,3-6,7-10 |
| Bulgaria Liga Pro | 2021/10/11 04:30 | Andrei Smirnov v Andrey Kapustin | 1-6,5-7 |