Round: 1
| Bulgaria Liga Pro | 2021/07/22 06:00 | Alexey Nikiforov v Andrei Smirnov | 6-1,3-6,8-10 |
| Bulgaria Liga Pro | 2021/07/22 04:30 | Andrei Smirnov v Alexey Nikiforov | 0-6,6-3,4-10 |
| Bulgaria Liga Pro | 2021/07/20 06:00 | Mikhail Suvorov v Alexey Nikiforov | 1-6,4-6 |
| Bulgaria Liga Pro | 2021/07/20 04:30 | Alexey Nikiforov v Mikhail Suvorov | 6-7,4-6 |
| Bulgaria Liga Pro | 2021/07/16 06:00 | Andrei Smirnov v Alexey Nikiforov | 6-2,4-6,10-7 |
| Bulgaria Liga Pro | 2021/07/16 04:30 | Alexey Nikiforov v Andrei Smirnov | 6-3,6-0 |
| Bulgaria Liga Pro | 2021/07/06 06:00 | Vladislav Pryakhin v Alexey Nikiforov | 2-6,2-6 |
| Bulgaria Liga Pro | 2021/07/06 04:30 | Alexey Nikiforov v Vladislav Pryakhin | 6-4,6-3 |
| Bulgaria Liga Pro | 2021/07/31 06:00 | Andrey Kapustin v Vladislav Pryakhin | 2-6,2-6 |
| Bulgaria Liga Pro | 2021/07/31 04:30 | Vladislav Pryakhin v Andrey Kapustin | 6-3,1-6,12-10 |
| Bulgaria Liga Pro | 2021/07/13 06:00 | Andrey Kapustin v Nikita Kuznetsov | 6-2,6-1 |
| Bulgaria Liga Pro | 2021/07/13 04:30 | Nikita Kuznetsov v Andrey Kapustin | 3-6,3-6 |
| Bulgaria Liga Pro | 2021/07/11 06:00 | Andrey Kapustin v Nikita Kuznetsov | 5-7,6-2,10-5 |
| Bulgaria Liga Pro | 2021/07/11 04:30 | Nikita Kuznetsov v Andrey Kapustin | 6-3,6-4 |
| Bulgaria Liga Pro | 2021/07/07 06:00 | Andrey Kapustin v Vladimir Kulikov | 7-6,6-3 |
| Bulgaria Liga Pro | 2021/07/07 04:30 | Vladimir Kulikov v Andrey Kapustin | 7-5,1-6,7-10 |