| Bulgaria Liga Pro | 2021/12/23 06:00 | Andrei Smirnov v Nikita Kuznetsov | 5-7,1-6 |
| Bulgaria Liga Pro | 2021/12/23 04:30 | Nikita Kuznetsov v Andrei Smirnov | 6-3,6-2 |
| Bulgaria Liga Pro | 2021/12/08 06:00 | Nikita Kuznetsov v Andrei Smirnov | 6-4,6-3 |
| Bulgaria Liga Pro | 2021/12/08 04:30 | Andrei Smirnov v Nikita Kuznetsov | 4-6,2-6 |
| Bulgaria Liga Pro | 2021/09/28 06:00 | Nikita Kuznetsov v Andrei Smirnov | 4-6,2-6 |
| Bulgaria Liga Pro | 2021/09/28 04:30 | Andrei Smirnov v Nikita Kuznetsov | 6-2,6-2 |