Stadium: Court 5 Round: 27 Ground: Clay
| ITF M25 Matsuyama | 2019/04/12 05:20 | Naoki Tajima v Shuichi Sekiguchi | 4-6,4-6 |
| ITF M25 Matsuyama | 2019/04/12 02:35 | Masamichi Imamura v Naoki Tajima | 2-6,4-6 |
| ITF M25 Matsuyama | 2019/04/11 01:00 | Naoki Tajima v Kousuke Ogura | 6-4,6-0 |
| ITF M15 Kashiwa | 2019/04/03 03:05 | Tamaki Yamao v Naoki Tajima | 6-1,3-6,6-2 |
| ITF M15 Tsukuba | 2019/03/30 01:00 | Naoki Tajima v Shintaro Imai | 1-6,2-6 |
| ITF M15 Tsukuba | 2019/03/29 03:35 | Naoki Tajima v Yuta Shimizu | 6-4,7-6 |
| ITF M15 Tsukuba | 2019/03/28 03:00 | Mark Whitehouse v Naoki Tajima | 4-6,6-4,3-6 |
| ITF M15 Tsukuba | 2019/03/27 03:25 | Issei Okamura v Naoki Tajima | 3-6,4-6 |
| ITF M25 Santa Margherita | 2019/04/16 14:30 | Alejandro Gomez v Kirill Kivattsev | 0-6,2-6 |
| ITF M25 Santa Margherita | 2019/04/09 15:00 | Kirill Kivattsev v Alejandro Gomez | 2-6,1-6 |
| ITF M15 Opatija | 2019/03/27 08:30 | Matej Sabanov v Kirill Kivattsev | 6-7,6-4,6-1 |
| ITF M15 Antalya | 2019/03/20 09:40 | Kirill Kivattsev v Yan Sabanin | 3-6,6-4,6-7 |
| ITF M15 Antalya | 2019/03/15 10:00 | Felipe Meligeni Rodrigues Alves v Kirill Kivattsev | 7-6,6-4 |
| ITF M15 Antalya | 2019/03/14 07:15 | Koray Kirci v Kirill Kivattsev | 2-6,6-2,4-6 |
| ITF M15 Antalya | 2019/03/12 08:00 | Bora Sengul v Kirill Kivattsev | 4-6,3-6 |
| ITF M15 Antalya | 2019/02/20 07:00 | Matias Zukas v Kirill Kivattsev | 7-5,6-1 |