Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF China F5 | 2017/04/13 05:05 | Yang, Tsung-Hua v Sekiguchi, Shuichi | 2-6,4-6 |
| Challenger Shanghai | 2017/09/12 06:35 | Kudryavtsev, Alexander v Sekiguchi, Shuichi | 6-4,4-6,2-6 |
| Zhangjiagang, China | 2017/09/07 04:35 | Sekiguchi, Shuichi v Mohamed Safwat | 7-6,1-6,3-6 |
| Zhangjiagang, China | 2017/09/05 08:00 | Sekiguchi, Shuichi v Takeuchi, Kento (1987) | 6-4,6-3 |
| Jinan, China | 2017/08/09 03:35 | Sekiguchi, Shuichi v Evgeny Donskoy | 2-6,3-6 |
| Jinan, China | 2017/08/07 03:40 | Prashanth, N. Vijay Sundar v Sekiguchi, Shuichi | 4-6,4-6 |
| Chengdu, China | 2017/08/01 02:00 | Yunseong Chung v Sekiguchi, Shuichi | 4-6,6-3,7-5 |
| 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 |
| Challenger Gwangju Qual | 2017/09/18 01:30 | Yang, Tsung-Hua v Niesten, Miliaan | 0-6,6-1,6-3 |
| Challenger Gwangju Qual | 2017/09/17 01:30 | Yang, Tsung-Hua v Yunseong Chung | 7-6,7-5 |
| Challenger Shanghai Qual | 2017/09/11 02:00 | Yang, Tsung-Hua v Mousley, Bradley | 6-7,6-3,6-7 |
| Challenger Zhangjiagang Qual | 2017/09/05 03:00 | Yang, Tsung-Hua v Kibi, Yuya | 6-2,3-6,5-7 |
| Challenger Zhangjiagang Qual | 2017/09/04 05:55 | Yang, Tsung-Hua v Podzus, Martins | 7-6,7-6 |
| ITF Turkey F30 | 2017/08/20 08:00 | Bega, Alessandro v Yang, Tsung-Hua | 7-6,3-6,7-5 |
| ITF Turkey F30 | 2017/08/19 10:15 | Yang, Tsung-Hua v Gabriel Donev | 6-2,6-2 |
| ITF Turkey F30 | 2017/08/18 09:30 | Yang, Tsung-Hua v Zukas, Matias | 3-6,6-1,6-2 |