Stadium: Court 2 Round: 25 Ground: Hardcourt indoor
| ITF M15 St Petersburg | 2021/04/06 09:00 | Ivan Nedelko v Petr Bar Biryukov | 6-3,6-1 |
| ITF M15 St Petersburg | 2021/02/11 11:10 | Evgeny Tyurnev v Petr Bar Biryukov | 6-2,7-5 |
| ITF M15 St Petersburg | 2021/02/09 07:00 | Petr Bar Biryukov v Aleksei Abazov | 6-3,6-0 |
| ITF M15 St Petersburg | 2021/02/03 09:10 | Bogdan Bobrov v Petr Bar Biryukov | 6-3,6-3 |
| ITF M15 St Petersburg | 2021/02/01 08:00 | Petr Bar Biryukov v Alexandr Binda | 6-4,3-6,10-3 |
| ITF M15 St Petersburg | 2021/01/31 10:00 | Lorenzo Bocchi v Petr Bar Biryukov | 4-6,4-6 |
| ITF M15 Cairo | 2021/01/12 08:30 | Petr Bar Biryukov v Mathieu Perchicot | 1-6,1-6 |
| Spring Tour | 2020/05/25 07:04 | Roman Lutkovskii v Kirill Saplin | 3-6,2-5 |
| Spring Tour | 2020/05/21 13:30 | Kirill Saplin v Sviatoslav Lutkovskii | 0-0 |
| Spring Tour | 2020/05/20 18:30 | Kirill Saplin v Sergey Dorozhkin | 5-7,4-6 |
| Spring Tour | 2020/05/20 14:00 | Kirill Saplin v Maksim Mokrousov | 6-4,3-6,6-10 |
| Spring Tour | 2020/05/19 20:25 | Kirill Saplin v Sviatoslav Lutkovskii | 6-7,6-3,10-2 |
| Spring Tour | 2020/05/19 16:45 | Kirill Saplin v Sviatoslav Lutkovskii | 3-6,6-7 |
| Spring Tour | 2020/05/18 19:30 | Kirill Saplin v Sviatoslav Lutkovskii | 3-6,4-6 |
| Spring Tour | 2020/05/18 16:30 | Kirill Saplin v Sviatoslav Lutkovskii | 7-5,3-6,4-10 |