Stadium: Court 6 Round: 27 Ground: Hardcourt indoor
| ITF M15 St Petersburg | 2021/02/10 07:00 | Matic Spec v Alexey Zakharov | 4-6,6-1,6-3 |
| ITF M15 Sharm El Sheikh | 2021/02/28 17:00 | Matic Spec v Danyil Chornous | 6-1,6-0 |
| ITF M15 Sharm El Sheikh | 2021/02/24 07:30 | George Loffhagen v Matic Spec | 6-3,6-1 |
| ITF M15 Sharm El Sheikh | 2021/02/23 07:30 | Luca Potenza v Matic Spec | 3-6,3-6 |
| ITF M15 Sharm El Sheikh | 2021/02/22 07:30 | Arvid Nordquist v Matic Spec | 6-4,2-6,8-10 |
| ITF M15 Sharm El Sheikh | 2021/02/21 07:00 | Philip Bachmaier v Matic Spec | 1-6,4-6 |
| 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 09:00 | Boris Pokotilov v Matic Spec | 3-6,3-6 |
| ITF M15 St Petersburg | 2021/02/10 07:00 | Matic Spec v Alexey Zakharov | 4-6,6-1,6-3 |
| Challenger St. Petersburg | 2021/02/28 09:20 | Alessandro Bega v Alexey Zakharov | 6-4,6-2 |
| Challenger Nur-Sultan | 2021/02/22 04:00 | Pavel Kotov v Alexey Zakharov | 7-5,1-6,6-3 |
| Challenger Nur-Sultan | 2021/02/21 07:05 | Grigoriy Lomakin v Alexey Zakharov | 2-6,3-6 |
| ITF M15 St Petersburg | 2021/02/10 07:00 | Matic Spec v Alexey Zakharov | 4-6,6-1,6-3 |
| ITF M15 St Petersburg | 2021/02/07 08:00 | Alexey Zakharov v Alibek Kachmazov | 4-6,7-5,4-6 |
| ITF M15 St Petersburg | 2021/02/06 08:00 | Jan Choinski v Alexey Zakharov | 6-7,1-6 |
| ITF M15 St Petersburg | 2021/02/05 08:30 | Alexey Zakharov v Martin Krumich | 7-5,6-1 |
| ITF M15 St Petersburg | 2021/02/04 07:00 | Alexey Zakharov v Karlis Ozolins | 4-6,6-2,7-6 |