Stadium: Court 3 Round: 25 Ground: Hardcourt indoor
| ITF - M15 St Petersburg | 2021/04/04 11:00 | Alexander Vasilenko v Victor Gurevich | 6-0,6-0 |
| ITF - M15 St Petersburg | 2021/02/13 08:00 | Alexander Vasilenko v Andrey Kuznetsov | 3-6,3-6 |
| ITF - M15 St Petersburg | 2021/02/12 08:30 | Alexander Vasilenko v Matic Spec | 6-2,1-6,6-3 |
| ITF - M15 St Petersburg | 2021/02/11 09:50 | Alexander Vasilenko v Vladimir Ivanov | 6-2,6-0 |
| ITF - M15 St Petersburg | 2021/02/09 08:30 | Bogdan Bobrov v Alexander Vasilenko | 6-4,2-6,4-6 |
| ITF - M15 St Petersburg | 2021/02/08 08:30 | Alexander Vasilenko v Vladislav Ivanov | 6-4,6-2 |
| ITF - M15 St Petersburg - Calificari | 2021/02/07 15:00 | Alexander Vasilenko v Ivan Abramov | 6-1,6-0 |
| ITF - M15 St Petersburg | 2021/02/04 09:35 | Alexander Vasilenko v Konstantin Kravchuk | 4-6,4-6 |
| ITF - M15 Ithaca | 2021/10/07 17:20 | Keegan Smith v Sebastian Dominko | 6-3,6-2 |
| ITF - M15 Ithaca | 2021/10/05 13:00 | Joshua Sheehy v Sebastian Dominko | 4-6,6-7 |
| Cupa Davis | 2021/09/18 13:55 | Sebastian Dominko v Hernando J E Isnardi | 6-4,3-6,7-10 |