Stadium: Indoor 2 Round: 46 Ground: Hardcourt outdoor
| Challenger Chengdu | 2017/08/01 02:00 | Yunseong Chung v Shuichi Sekiguchi | 4-6,6-3,7-5 |
| Challenger Ho Chi Minh City Qual | 2016/10/10 04:45 | Shuichi Sekiguchi v Yunseong Chung | 6-4,4-6,6-4 |
| Challenger Gwangju | 2017/09/19 01:30 | Shuichi Sekiguchi v Tsung-Hua Yang | 5-7,6-7 |
| Challenger Shanghai | 2017/09/12 06:35 | Alexander Kudryavtsev v Shuichi Sekiguchi | 6-4,4-6,2-6 |
| Challenger Zhangjiagang | 2017/09/07 04:35 | Shuichi Sekiguchi v Mohamed Safwat | 7-6,1-6,3-6 |
| Challenger Zhangjiagang | 2017/09/05 08:00 | Shuichi Sekiguchi v Kento Takeuchi | 6-4,6-3 |
| Challenger Jinan | 2017/08/09 03:35 | Shuichi Sekiguchi v Evgeny Donskoy | 2-6,3-6 |
| Challenger Jinan | 2017/08/07 03:40 | N. Vijay Sundar Prashanth v Shuichi Sekiguchi | 4-6,4-6 |
| Challenger Chengdu | 2017/08/01 02:00 | Yunseong Chung v Shuichi Sekiguchi | 4-6,6-3,7-5 |
| ITF China F14 | 2017/07/29 04:50 | Nikola Milojevic v Shuichi Sekiguchi | 6-4,6-0 |
| Challenger Gwangju Qual | 2017/09/17 01:30 | Tsung-Hua Yang v Yunseong Chung | 7-6,7-5 |
| Challenger Gwangju Qual | 2017/09/16 01:30 | Yunseong Chung v Seong Taek Im | 6-1,7-6 |
| Challenger Shanghai Qual | 2017/09/09 02:00 | Yunseong Chung v Zhicheng Zhu | 6-3,6-1 |
| Challenger Chengdu | 2017/08/03 03:00 | Yunseong Chung v Nikola Milojevic | 6-7,4-6 |
| Challenger Chengdu | 2017/08/01 02:00 | Yunseong Chung v Shuichi Sekiguchi | 4-6,6-3,7-5 |
| 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 | Sergey Betov v Yunseong Chung | 2-6,6-7 |
| ITF China F14 | 2017/07/25 03:35 | Yunseong Chung v Jie Cui | 3-6,5-7 |