Stadium: Court 6 Round: 54 Ground: Hardcourt indoor
| ITF M15 St Petersburg | 2021/04/13 11:30 | Patrik Rikl v Aristarkh Safonov | 6-4,6-2 |
| ITF M15 St Petersburg | 2021/04/09 09:40 | Aristarkh Safonov v Jan Satral | 4-6,2-6 |
| ITF M15 St Petersburg | 2021/04/08 09:00 | Matic Spec v Aristarkh Safonov | 3-6,5-7 |
| ITF M15 St Petersburg | 2021/04/06 07:00 | Alexander Wolfschmidt v Aristarkh Safonov | 6-4,1-6,5-7 |
| ITF M15 Kazan | 2021/10/11 09:50 | Egor Khotchenkov v Nikita Ianin | 6-3,6-7,3-10 |
| ITF M15 Monastir | 2021/08/02 08:30 | Nikita Ianin v Martin Dimitrov | 4-6,6-3,5-10 |
| ITF M15 Monastir | 2021/07/25 12:00 | Siddhant Banthia v Nikita Ianin | 1-6,7-6,10-5 |