Stadium: Court 7 Round: 25 Ground: Clay
| Irpin, Singles Qualifying M-ITF-UKR-04A | 2019/05/20 10:00 | Nikita Mashtakov v Aliaksandr Liaonenka | 6-4,6-0 |
| Irpin, Singles Qualifying M-ITF-UKR-04A | 2019/05/20 06:30 | Nikita Mashtakov v Beibit Zhukayev | 6-4,7-5 |
| ITF M15 Sozopol | 2019/05/10 08:30 | Nikita Mashtakov v Alexander Donski | 3-6,6-7 |
| 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 | Esteve Lobato, Eduard v Nikita Mashtakov | 6-3,6-1 |
| ITF M15 Reus | 2019/04/08 08:30 | Nikita Mashtakov v Santillana, Arnau | 6-0,6-0 |
| ITF M15 Valldoreix | 2019/05/14 13:15 | Oriol Roca Batalla v Naoki Tajima | 6-1,6-4 |
| ITF M15 Grasse | 2019/05/04 14:20 | Naoki Tajima v Hamou, Maxime | 3-6,3-6 |
| ITF M15 Grasse | 2019/05/03 10:35 | Naoki Tajima v Kirill Kivattsev | 6-7,6-4,7-6 |
| ITF M15 Grasse | 2019/05/02 13:45 | Naoki Tajima v Broville, Maxence | 6-2,6-2 |
| ITF M15 Grasse | 2019/04/30 15:10 | Tchoutakian, Maxime v Naoki Tajima | 4-6,4-6 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/12 05:20 | Naoki Tajima v Sekiguchi, Shuichi | 4-6,4-6 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/12 02:35 | Masamichi Imamura v Naoki Tajima | 2-6,4-6 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/11 01:00 | Naoki Tajima v Kousuke Ogura | 6-4,6-0 |