Stadium: Court 1 Round: 25 Ground: Clay
| Challenger Nanchang Qual | 2018/04/15 05:25 | Mukund Sasikumar v Yunseong Chung | 2-6,4-6 |
| Challenger Nanchang Qual | 2018/04/14 04:40 | Wu, Hao v Yunseong Chung | 3-6,1-6 |
| Challenger Taipei Qual | 2018/04/07 02:00 | Grills, Jacob v Yunseong Chung | 6-3,2-6,6-2 |
| Challenger Qujing | 2018/03/20 04:45 | Jaziri, Malek v Yunseong Chung | 6-2,6-4 |
| Challenger Qujing Qual | 2018/03/18 05:45 | Yunseong Chung v Elgin, M. | 6-3,6-7,6-3 |
| Shenzhen, China, Qualifying | 2018/03/11 06:00 | Yunseong Chung v Quinzi, Gianluigi | 6-7,6-3,5-7 |
| Challenger Zhuhai Qual | 2018/03/04 08:35 | Alex Bolt v Yunseong Chung | 6-4,6-2 |
| Challenger Zhuhai Qual | 2018/03/03 06:50 | Yunseong Chung v Andrea Vavassori | 6-3,4-6,6-3 |
| Taipei, Chinese Taipei | 2018/04/14 06:55 | Tatsuma Ito v Bhambri, Yuki | 6-3,3-6,4-6 |
| Taipei, Chinese Taipei | 2018/04/13 07:30 | Jason Jung v Tatsuma Ito | 6-3,6-7,6-7 |
| Taipei, Chinese Taipei | 2018/04/12 13:15 | Soonwoo Kwon v Tatsuma Ito | 6-4,6-7,4-6 |
| Taipei, Chinese Taipei | 2018/04/11 03:00 | Grigelis, Laurynas v Tatsuma Ito | 7-6,4-6,3-6 |
| ITF Japan F3 | 2018/03/23 02:00 | Tatsuma Ito v Hong, Seong Chan | 5-7,6-2,2-6 |
| ITF Japan F3 | 2018/03/22 06:55 | Tatsuma Ito v Tanuma, Ryota | 6-7,6-2,6-1 |
| ITF Japan F3 | 2018/03/22 03:00 | Tatsuma Ito v Masamichi Imamura | 6-2,6-0 |
| ITF Japan F3 | 2018/03/20 06:00 | Tatsuma Ito v Naoki Nakagawa | 6-2,6-3 |