Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Novomoskovsk | 2021/06/03 18:30 | Nikita Mashtakov v Martins Podzus | 4-6,1-6 |
| ITF M15 Novomoskovsk | 2021/05/28 07:15 | Felix Gill v Nikita Mashtakov | 7-5,6-7,6-4 |
| ITF M15 Novomoskovsk | 2021/05/27 07:15 | Oleksandr Bielinskyi v Nikita Mashtakov | 6-3,1-6,5-7 |
| ITF M15 Novomoskovsk | 2021/05/26 06:15 | Nikita Mashtakov v Martins Podzus | 5-7,6-3,6-4 |
| ITF M15 Sibenik | 2021/05/20 11:00 | Nikita Mashtakov v Tom Kocevar-Desman | 5-7,4-6 |
| ITF M15 Sibenik | 2021/05/19 10:30 | Matias Zukas v Nikita Mashtakov | 2-6,3-6 |
| ITF M15 Shymkent | 2021/04/16 07:30 | Andrey Chepelev v Nikita Mashtakov | 3-6,6-1,6-4 |
| ITF M15 Shymkent | 2021/04/15 06:20 | Grigoriy Lomakin v Nikita Mashtakov | 2-6,3-6 |
| ITF M15 Sofia | 2021/07/05 14:00 | Mihai Razvan Marinescu v Marat Sharipov | 7-5,6-7,10-8 |
| ITF M15 Sofia | 2021/07/05 08:00 | Martin Dimitrov v Mihai Razvan Marinescu | 6-3,6-7,5-10 |
| UTR Pro Tennis Series Bucharest | 2021/06/04 07:00 | Mihai Razvan Marinescu v Vladimir Filip | 0-6,3-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/03 07:30 | Ihor Dudun v Mihai Razvan Marinescu | 0-6,1-5 |
| UTR Pro Tennis Series Bucharest | 2021/05/30 13:00 | Mihai Razvan Marinescu v Warren Sinius | 6-4,6-1 |
| ITF M15 Bucharest | 2021/05/24 09:30 | Quentin Folliot v Mihai Razvan Marinescu | 6-4,7-5 |
| ITF M15 Bucharest | 2021/05/23 12:00 | Mihai Razvan Marinescu v Allan Deschamps | 6-2,6-4 |
| ITF M15 Curtea de Arges | 2020/09/13 12:00 | Mihai Razvan Marinescu v Bruno P Navarro | 6-7,4-6 |