Estadio: COURT 7 Round: 25 Ground: Hardcourt indoor
| ITF M25 Falun | 2021/09/27 12:00 | Sergey Fomin v Vasil Kirkov | 3-6,2-6 |
| ITF M25 Jönköping | 2021/09/21 10:45 | Renta Tokuda v Sergey Fomin | 6-4,6-4 |
| Challenger de Nur-Sultan | 2021/07/11 08:45 | Andrey Kuznetsov v Sergey Fomin | 6-3,6-1 |
| ITF M25 Nur-Sultán | 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 |
| ITF 15 Antalya | 2021/05/11 08:25 | Mick Veldheer v Sergey Fomin | 6-7,6-2,6-1 |
| ITF M15 Shymkent | 2021/04/08 07:25 | Sergey Fomin v Andrey Chepelev | 7-6,7-5 |
| ITF M15 Sozopol | 2021/09/16 09:35 | Martin Krumich v Konstantin Zhzhenov | 6-2,6-4 |
| ITF M15 Sozopol | 2021/09/14 10:00 | Konstantin Zhzhenov v Baran Cengiz | 6-7,6-4,6-1 |
| ITF M15 Kazán | 2021/03/09 11:30 | Konstantin Zhzhenov v Evgeny Philippov | 5-7,3-6 |