| 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 |
| Bulgaria Liga Pro | 2021/10/25 06:00 | Nikita Kuznetsov v Andrey Kapustin | 6-3,6-4 |
| Bulgaria Liga Pro | 2021/10/25 04:30 | Andrey Kapustin v Nikita Kuznetsov | 3-6,4-6 |
| Bulgaria Liga Pro | 2021/10/22 06:00 | Pavel Zelenkin v Nikita Kuznetsov | 3-6,2-6 |
| Bulgaria Liga Pro | 2021/10/22 04:30 | Nikita Kuznetsov v Pavel Zelenkin | 6-3,6-3 |
| Bulgaria Liga Pro | 2021/10/18 06:00 | Nikita Kuznetsov v Andrey Kapustin | 6-3,4-6,7-10 |
| Bulgaria Liga Pro | 2021/10/18 04:30 | Andrey Kapustin v Nikita Kuznetsov | 6-4,6-2 |
| 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 |
| Bulgaria Liga Pro | 2021/11/10 06:00 | Andrei Smirnov v Andrey Kapustin | 6-4,6-2 |
| Bulgaria Liga Pro | 2021/11/10 04:30 | Andrey Kapustin v Andrei Smirnov | 4-6,6-1,7-10 |
| Bulgaria Liga Pro | 2021/10/27 06:00 | Ivan Erastov v Andrei Smirnov | 2-6,6-4,10-3 |
| Bulgaria Liga Pro | 2021/10/27 04:30 | Andrei Smirnov v Ivan Erastov | 6-1,4-6,8-10 |
| 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 | 2021/10/13 06:00 | Pavel Zelenkin v Andrei Smirnov | 6-4,7-6 |
| Bulgaria Liga Pro | 2021/10/13 04:30 | Andrei Smirnov v Pavel Zelenkin | 7-5,6-4 |