Stadium: Court 6 Round: 26 Ground: Clay
| ITF - M15 Héraklion | 2019/11/19 08:30 | Kocevar-Desman, Tom v Nikita Mashtakov | 3-6,4-6 |
| 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 |
| ITF - M15 Rovinj | 2021/03/16 12:20 | Nikita Mashtakov v Cornut-Chauvinc, Antoine | 4-6,6-3,1-6 |
| ITF - M15 Porec | 2021/03/10 13:30 | Nikita Mashtakov v Gergely Madarasz | 6-3,1-6,2-6 |
| ITF M15 Cairo | 2020/12/10 08:00 | Nikita Mashtakov v Aldin Setkic | 2-6,4-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/19 14:25 | Kocevar-Desman, Tom v Jaimee Floyd Angele | 6-3,7-6 |
| ITF M15 Troisdorf | 2021/05/14 12:35 | Kocevar-Desman, Tom v Timo Stodder | 6-2,3-6,5-7 |
| ITF M15 Troisdorf | 2021/05/13 09:00 | Dan Added v Kocevar-Desman, Tom | 6-7,6-7 |
| ITF M15 Troisdorf | 2021/05/12 09:00 | Schmitz, Constantin v Kocevar-Desman, Tom | 6-4,4-6,3-6 |
| ITF M15 Troisdorf | 2021/05/11 08:00 | Kocevar-Desman, Tom v Yannik Steinegger | 6-3,6-1 |
| ITF M15 Troisdorf | 2021/05/10 09:30 | Kocevar-Desman, Tom v Hazem Naw | 6-3,6-4 |
| ITF M15 Troisdorf | 2021/05/09 08:00 | Kocevar-Desman, Tom v Kecojevic, Mihailo | 6-1,6-2 |
| ITF - M15 Monastir | 2021/04/06 09:00 | Kocevar-Desman, Tom v Sho Shimabukuro | 3-6,6-3,3-6 |