Stadion: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF - M15 - Sozopol | 2019/05/07 14:00 | Oleksii Krutykh v Nikita Mashtakov | 4-6,4-6 |
| ITF - M15 - Tbilisi | 2019/05/01 07:55 | Nikita Mashtakov v John Echeverria | 4-6,4-6 |
| ITF - M15 - Madrid | 2019/04/15 09:30 | Nikita Mashtakov v Joffrey De Schepper | 3-6,3-6 |
| ITF M15 Reus | 2019/04/10 10:25 | Eduard Esteve Lobato v Nikita Mashtakov | 6-3,6-1 |
| ITF M15 Reus | 2019/04/08 08:30 | Nikita Mashtakov v Arnau Santillana | 6-0,6-0 |
| ITF - M15 - Opatija | 2019/03/27 14:25 | Nikita Mashtakov v Markus Eriksson | 6-3,3-6,3-6 |
| ITF - M15 - Opatija | 2019/03/26 10:50 | Nikita Mashtakov v Isa Mammetgulyyev | 6-4,6-2 |
| ITF - M15 - Opatija | 2019/03/25 11:45 | Nikita Mashtakov v Goran Radanovic | 6-2,6-3 |
| ITF - M15 - Sozopol | 2019/05/08 08:00 | Gabriel Donev v Boris Pokotilov | 5-7,6-4,6-4 |
| ITF - M15 - Sunrise | 2019/04/08 15:00 | Alexander Knight v Gabriel Donev | 6-4,6-3 |
| ITF - M15 - Cancun | 2019/03/27 16:30 | Gabriel Donev v Andrew Watson | 0-6,2-6 |
| ITF - M15 - Cancun | 2019/03/25 19:00 | George Botezan v Gabriel Donev | 2-6,2-6 |
| ITF - M15 - Cancun | 2019/03/25 17:00 | Wilfredo Gonzalez v Gabriel Donev | 2-6,6-3,8-10 |
| 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 |