Stadium: Court 17 Round: 25 Ground: Hardcourt outdoor
| Challenger Ho Chi Minh City Qual | 2016/10/10 04:45 | Sekiguchi, Shuichi v Yunseong Chung | 6-4,4-6,6-4 |
| Challenger Chengdu Qual | 2017/07/30 03:00 | Vishnu Vardhan v Yunseong Chung | 4-6,3-6 |
| Challenger Chengdu Qual | 2017/07/29 03:55 | Betov, Sergey v Yunseong Chung | 2-6,6-7 |
| ITF China F14 | 2017/07/25 03:35 | Yunseong Chung v Jie Cui | 3-6,5-7 |
| ITF China F13 | 2017/07/20 02:00 | Hung, Jui-Chen v Yunseong Chung | 1-6,6-3,6-4 |
| ITF China F13 | 2017/07/18 05:35 | Feng, He v Yunseong Chung | 4-6,4-6 |
| ITF Korea F5 | 2017/06/29 01:30 | Yunseong Chung v Lee, Tae-Woo | 5-7,6-7 |
| ITF Korea F5 | 2017/06/28 06:50 | Yunseong Chung v Kim, A-Ram | 6-1,6-2 |
| ITF Korea F4 | 2017/06/23 03:30 | Yunseong Chung v Kim, Cheong-Eui | 5-7,6-7 |
| ITF China F14 | 2017/07/29 04:50 | Nikola Milojevic v Sekiguchi, Shuichi | 6-4,6-0 |
| ITF China F14 | 2017/07/28 03:00 | Sekiguchi, Shuichi v Singh, Karunuday | 6-3,7-6 |
| ITF China F14 | 2017/07/26 02:00 | Sekiguchi, Shuichi v Cao, Zhaoyi | 6-4,6-2 |
| Challenger Astana | 2017/07/20 07:40 | Sekiguchi, Shuichi v Alexander Bublik | 3-6,5-7 |
| Challenger Astana | 2017/07/18 05:00 | Zhyrmont, Dzmitry v Sekiguchi, Shuichi | 2-6,6-1,3-6 |
| Fergana, Uzbekistan | 2017/06/21 06:30 | Ilya Ivashka v Sekiguchi, Shuichi | 6-2,6-2 |
| Fergana, Uzbekistan | 2017/06/19 06:00 | Sekiguchi, Shuichi v Manafov, Vladyslav | 6-4,3-6,7-5 |
| ITF Chinese Taipei F1 | 2017/06/13 03:25 | Tung-Lin Wu v Sekiguchi, Shuichi | 6-4,6-2 |