Round: 26 Ground: Synthetic outdoor
| ITF Japan F7 | 2017/06/05 02:50 | Rio Noguchi v Yuki Matsuo | 3-6,0-6 |
| ITF Japan F6 | 2017/05/30 06:05 | Yuki Matsuo v Yusuke Takahashi | 2-6,6-7 |
| ITF Japan F6 Qual | 2017/05/29 03:40 | Yuki Matsuo v Masaki Osafune | 7-6,6-2 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Yuki Matsuo v Keigo Shimizu | 7-6,5-7,6-1 |
| ITF Japan F5 | 2017/04/06 02:50 | Yusuke Takahashi v Yuki Matsuo | 6-2,6-3 |
| ITF Japan F5 | 2017/04/04 00:30 | Yuki Matsuo v Koichi Sano | 7-5,7-6 |
| ITF Japan F4 | 2017/03/28 01:00 | Chan-Yeong Oh v Yuki Matsuo | 6-1,6-1 |
| ITF Japan F4 | 2017/03/27 01:00 | Takashi Yasugami v Yuki Matsuo | 7-6,1-6,1-6 |
| ITF Japan F7 | 2017/06/05 04:10 | Hiroyasu Ehara v Shuichi Sekiguchi | 2-6,1-6 |
| ITF Japan F6 | 2017/05/31 01:00 | Gengo Kikuchi v Shuichi Sekiguchi | 6-4,6-2 |
| ITF Japan F6 | 2017/05/29 05:55 | Yuki Mochizuki v Shuichi Sekiguchi | 3-6,4-6 |
| Challenger Seoul | 2017/05/09 04:00 | Duckhee Lee v Shuichi Sekiguchi | 6-0,6-3 |
| Challenger Seoul Qual | 2017/05/08 02:00 | Lloyd Glasspool v Shuichi Sekiguchi | 3-6,3-6 |
| Challenger Seoul Qual | 2017/05/07 04:20 | Makoto Ochi v Shuichi Sekiguchi | 1-6,1-6 |
| Challenger Seoul Qual | 2017/05/06 06:05 | Yu-Seob Kim v Shuichi Sekiguchi | 1-6,4-6 |
| Challenger Taipei | 2017/04/18 06:20 | Shuichi Sekiguchi v Franko Skugor | 1-6,4-6 |