Round: 1
| Bulgaria Liga Pro | 2021/07/21 06:00 | Dmitriy Volkov v Sergey Berezhnov | 7-6,3-6,10-7 |
| Bulgaria Liga Pro | 2021/07/21 04:30 | Sergey Berezhnov v Dmitriy Volkov | 7-6,4-6,2-10 |
| Bulgaria Liga Pro | 2021/07/19 06:00 | Dmitriy Volkov v Sergey Berezhnov | 6-4,2-6,6-10 |
| Bulgaria Liga Pro | 2021/07/19 04:30 | Sergey Berezhnov v Dmitriy Volkov | 6-2,1-6,9-11 |
| Bulgaria Liga Pro | 2021/07/17 06:00 | Aleksandr Gorbachyov v Sergey Berezhnov | 6-7,7-5,10-6 |
| Bulgaria Liga Pro | 2021/07/17 04:30 | Sergey Berezhnov v Aleksandr Gorbachyov | 7-5,6-0 |
| Bulgaria Liga Pro | 2021/07/05 18:30 | Sergey Berezhnov v Anton Kondrashov | 0-6,4-6 |
| Bulgaria Liga Pro | 2021/07/05 17:00 | Anton Kondrashov v Sergey Berezhnov | 6-3,6-3 |
| Bulgaria Liga Pro | 2021/07/23 18:30 | Konstantin Kromin v Anton Kondrashov | 3-6,1-6 |
| Bulgaria Liga Pro | 2021/07/23 17:00 | Anton Kondrashov v Konstantin Kromin | 7-5,6-2 |
| Bulgaria Liga Pro | 2021/07/12 18:30 | Konstantin Kromin v Artem Simashev | 1-6,4-6 |
| Bulgaria Liga Pro | 2021/07/12 17:00 | Artem Simashev v Konstantin Kromin | 6-4,6-0 |
| Bulgaria Liga Pro | 2021/07/10 18:30 | Konstantin Kromin v Aleksandr Repin | 4-6,4-6 |
| Bulgaria Liga Pro | 2021/07/10 17:00 | Aleksandr Repin v Konstantin Kromin | 6-4,6-3 |