Stadium: Court 3 Round: 27 Ground: Clay
| ITF M15 Novomoskovsk | 2021/05/27 10:40 | Dembek, Michal v Felix Gill | 3-6,5-7 |
| ITF M15 Novomoskovsk | 2021/05/25 11:00 | Felix Gill v German Samofalov | 6-2,6-7,6-2 |
| ITF M15 Cairo | 2021/05/04 08:00 | Felix Gill v Kolisnyk, Olexiy | 1-6,3-6 |
| ITF M15 Cairo | 2021/05/03 08:00 | Felix Gill v Tanner, Gian Luca | 4-6,6-3,10-7 |
| ITF M15 Cairo | 2021/04/29 08:00 | Carlos Sanchez Jover v Felix Gill | 6-4,7-5 |
| ITF M15 Cairo | 2021/04/28 08:00 | Felix Gill v Ivic, Stefan | 6-4,6-0 |
| ITF M15 Cairo | 2021/04/27 10:25 | Felix Gill v Yuichiro Inui | 7-6,6-1 |
| ITF M15 Cairo | 2021/04/26 12:30 | Felix Gill v El-Moslemany, Omar | 6-3,6-0 |
| ITF M15 Novomoskovsk | 2021/05/27 07:15 | Bielinskyi, Oleksandr v Nikita Mashtakov | 6-3,1-6,5-7 |
| ITF M15 Novomoskovsk | 2021/05/26 06:15 | Nikita Mashtakov v Podzus, Martins | 5-7,6-3,6-4 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/20 11:00 | Nikita Mashtakov v Kocevar-Desman, Tom | 5-7,4-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/19 10:30 | Zukas, Matias 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 Shymkent | 2021/04/14 07:30 | Alexander Chepik v Nikita Mashtakov | 7-6,3-6,4-6 |
| ITF - M15 Shymkent | 2021/04/07 10:45 | Nikita Mashtakov v Luca Tomasetto | 6-7,3-6 |