Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Taipei | 2019/07/23 02:00 | Taisei Ichikawa v Seita Watanabe | 5-7,4-6 |
| ITF M25 Taipei | 2019/07/17 02:00 | Yan Bai v Seita Watanabe | 6-0,6-2 |
| ITF M25 Taipei | 2019/07/16 03:50 | Ren Nakamura v Seita Watanabe | 6-4,4-6,5-10 |
| ITF M25 Taipei | 2019/07/15 04:30 | Mu Fu Tsai v Seita Watanabe | 0-6,0-6 |
| ITF M15 Gimcheon | 2019/06/18 03:20 | Seita Watanabe v Seong Taek Im | 3-6,7-6,12-14 |
| ITF M15 Gimcheon | 2019/06/12 03:20 | Seong-Gook Oh v Seita Watanabe | 6-7,6-2,6-3 |
| ITF M15 Gimcheon | 2019/06/11 02:50 | Seita Watanabe v Hyung-Chan Lim | 6-4,6-0 |
| ITF M15 Gimcheon | 2019/06/10 02:00 | Seita Watanabe v Jin Sung Han | 6-1,6-2 |
| ITF M25 Taipei | 2019/07/16 05:15 | Chien Hsun Lo v Yu Hsiou Hsu | 2-6,6-4,2-6 |
| ITF - M25 Yinchuan | 2019/06/28 03:20 | Chien Hsun Lo v Takuto Niki | 3-6,6-4,0-6 |
| ITF M25 Hengyang | 2019/06/21 02:00 | Tsung-Hao Huang v Chien Hsun Lo | 6-3,6-2 |
| ITF M25 Hengyang | 2019/06/20 03:35 | Sheng Hao Zhou v Chien Hsun Lo | 4-6,6-4,1-6 |
| ITF M25 Hengyang | 2019/06/19 06:00 | Wei-De Lin v Chien Hsun Lo | 6-3,2-6,3-6 |
| ITF - M15 Heraklion | 2019/05/29 11:20 | Markos Kalovelonis v Chien Hsun Lo | 6-3,7-6 |
| ITF - M15 Heraklion | 2019/05/21 08:35 | Patrik Nema v Chien Hsun Lo | 6-4,6-3 |
| Challenger Nanchang | 2019/04/22 04:00 | Akira Santillan v Chien Hsun Lo | 6-1,6-2 |