Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Kazan | 2021/10/14 10:05 | Sergey Fomin v Egor Agafonov | 6-7,6-3,4-6 |
| ITF - M15 Kazan | 2021/10/13 13:25 | Sergey Fomin v Konstantin Zhzhenov | 7-5,6-4 |
| ITF - M25 Falun | 2021/09/27 12:00 | Sergey Fomin v Vasil Kirkov | 3-6,2-6 |
| ITF - M25 Jonkoping | 2021/09/21 10:45 | Renta Tokuda v Sergey Fomin | 6-4,6-4 |
| Challenger - Nur-Sultan | 2021/07/11 08:45 | Andrey Kuznetsov v Sergey Fomin | 6-3,6-1 |
| ITF - M25 Nur-Sultan | 2021/07/07 04:00 | Beibit Zhukayev v Sergey Fomin | 7-6,7-6 |
| ITF - M15 Shymkent | 2021/05/27 05:00 | Alexander Shevchenko v Sergey Fomin | 6-2,6-1 |
| ITF - M15 Shymkent | 2021/05/26 04:00 | Sergey Fomin v Bulat Galiev | 6-4,7-6 |