Stadium: Court 2 Round: 25 Ground: Clay
| Challenger Qujing | 2018/03/20 02:00 | Duckhee Lee v Hubert Hurkacz | 3-6,3-6 |
| Challenger Shenzhen | 2018/03/15 09:20 | Malek Jaziri v Duckhee Lee | 6-2,6-2 |
| Challenger Shenzhen | 2018/03/13 05:55 | Jason Jung v Duckhee Lee | 6-4,5-7,4-6 |
| Challenger Yokohama | 2018/02/28 01:30 | Duckhee Lee v Cem Ilkel | 2-6,6-2,6-7 |
| Challenger Yokohama | 2018/02/27 02:20 | Duckhee Lee v Tim Puetz | 4-6,6-4,6-3 |
| Challenger Chennai | 2018/02/16 05:30 | Duckhee Lee v Yuki Bhambri | 5-7,2-6 |
| Challenger Chennai | 2018/02/15 05:30 | Antoine Escoffier v Duckhee Lee | 2-6,6-3,3-6 |
| Challenger Chennai | 2018/02/14 04:30 | Abhinav Sanjeev Shanmugam v Duckhee Lee | 2-6,4-6 |
| ITF Japan F5 | 2018/03/31 03:30 | Issei Okamura v Yuta Kawahashi | 3-6,1-6 |
| ITF Japan F4 | 2018/03/27 01:00 | Yuta Kawahashi v Shintaro Imai | 3-6,3-6 |
| ITF Japan F3 | 2018/03/18 01:00 | Masamichi Imamura v Yuta Kawahashi | 7-5,6-2 |
| ITF Japan F3 | 2018/03/17 02:30 | Yuta Kawahashi v Jae-Min Seol | 6-2,6-3 |
| ITF Japan F3 | 2018/03/17 00:30 | Yuta Kawahashi v Yunosuke Tanaka | 6-3,6-1 |
| ITF Japan F5 | 2017/04/01 02:00 | Ibuki Furuta v Yuta Kawahashi | 6-2,6-4 |
| ITF Japan F4 | 2017/03/28 03:00 | Yuta Kawahashi v Tung-Lin Wu | 7-6,1-6,4-6 |
| ITF Japan F3 | 2017/03/18 08:00 | Masaya Kobayashi v Yuta Kawahashi | 6-2,7-5 |