Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Antalya | 2019/03/06 10:10 | Matias Zukas v Nikita Mashtakov | 6-3,5-7,6-2 |
| ITF M15 Antalya | 2019/02/25 15:00 | Nikita Mashtakov v Matyas Fuele | 4-6,6-3,6-10 |
| ITF M15 Antalya | 2019/02/02 07:00 | Bruno Santanna v Nikita Mashtakov | 4-6,6-3,12-10 |
| ITF M15 Antalya | 2019/02/01 07:00 | Nikita Mashtakov v Alexandros Skorilas | 6-4,6-2 |
| ITF M15 Antalya | 2019/01/25 09:40 | Nikita Mashtakov v Wilson Leite | 6-1,4-6,6-10 |
| ITF M15 Antalya | 2019/01/16 07:00 | Nikita Mashtakov v Timofey Skatov | 4-6,6-4,5-7 |
| ITF Estonia F3 | 2018/11/07 10:55 | Martins Podzus v Nikita Mashtakov | 6-2,6-1 |
| ITF Estonia F3 | 2018/11/05 09:00 | Nikita Mashtakov v Siim Troost | 6-4,1-6,6-3 |
| ITF M15 Cancun | 2019/03/18 18:30 | Maksim Tikhomirov v Gabriel Donev | 6-2,6-2 |
| ITF M15 Cancun | 2019/03/18 14:30 | Matt McBride v Gabriel Donev | 6-4,4-6,8-10 |
| ITF M15 Antalya | 2019/02/18 07:00 | Alexander Weis v Gabriel Donev | 6-2,6-0 |
| ATP Sofia | 2019/02/03 14:05 | Sergiy Stakhovsky v Gabriel Donev | 6-1,6-2 |
| ITF Turkey F37 | 2018/11/24 07:00 | Edris Fetisleam v Gabriel Donev | 6-1,6-4 |
| ITF Turkey F37 | 2018/11/23 08:25 | Thomas Statzberger v Gabriel Donev | 2-6,6-3,2-6 |
| ITF Turkey F37 | 2018/11/22 08:35 | Shao-Fan Liu v Gabriel Donev | 6-2,2-6,3-6 |
| ITF Turkey F37 | 2018/11/21 07:00 | Gabriel Donev v Davide Galoppini | 4-6,6-3,6-4 |