Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF M15 St Petersburg | 2021/02/03 09:10 | Bogdan Bobrov v Petr Bar Biryukov | 6-3,6-3 |
| ITF M25 Nur-Sultan | 2021/10/27 08:05 | Egor Agafonov v Petr Bar Biryukov | 4-6,3-6 |
| ITF M25 Nur-Sultan | 2021/10/25 04:55 | Petr Bar Biryukov v Yerassyl Murat | 6-1,6-4 |
| ITF M25 Nur-Sultan | 2021/10/21 05:00 | Filip Peliwo v Petr Bar Biryukov | 3-6,7-5,6-3 |
| ITF M25 Nur-Sultan | 2021/10/20 07:50 | Yan Sabanin v Petr Bar Biryukov | 4-6,6-7 |
| ITF M25 Nur-Sultan | 2021/10/18 09:00 | Petr Bar Biryukov v Mykyta Riepkin | 6-2,6-3 |
| ITF M15 Kazan | 2021/10/13 10:05 | Ivan Liutarevich v Petr Bar Biryukov | 2-6,7-5,6-1 |
| ITF M15 Telavi | 2021/08/02 08:00 | Petr Bar Biryukov v Giorgi Javakhishvili | 7-6,4-6,9-11 |
| ITF M25 Telavi | 2021/07/26 13:10 | Petr Bar Biryukov v Ondrej Horak | 4-6,2-6 |
| ITF M25 Nur-Sultan | 2021/10/27 06:30 | Maxim Krapivin v Bogdan Bobrov | 5-7,3-6 |
| ITF M25 Nur-Sultan | 2021/10/21 05:00 | Konstantin Kravchuk v Bogdan Bobrov | 3-6,6-4,6-4 |
| ITF M25 Nur-Sultan | 2021/10/20 08:20 | Daniel Ibragimov v Bogdan Bobrov | 2-6,4-6 |
| ITF M15 Kazan | 2021/10/17 07:00 | Alibek Kachmazov v Bogdan Bobrov | 5-7,4-6 |
| ITF M15 Kazan | 2021/10/16 11:20 | Pavel Verbin v Bogdan Bobrov | 4-6,2-6 |
| ITF M15 Kazan | 2021/10/15 09:00 | Aristarkh Safonov v Bogdan Bobrov | 0-6,3-6 |
| ITF M15 Kazan | 2021/10/14 09:25 | Marat Sharipov v Bogdan Bobrov | 4-6,6-4,4-6 |
| ITF M15 Kazan | 2021/10/13 14:20 | Danil Spasibo v Bogdan Bobrov | 1-6,1-6 |