Round: 26 Ground: Clay
| ITF Guam F1 | 2016/05/27 05:45 | Gengo Kikuchi v Shuichi Sekiguchi | 6-7,6-7 |
| ITF Japan F1 | 2016/03/12 05:30 | Gengo Kikuchi v Shuichi Sekiguchi | 7-6,6-1 |
| ITF Japan F6 | 2017/05/29 04:20 | Ryota Kishi v Gengo Kikuchi | 7-6,3-6,2-6 |
| ITF Japan F5 | 2017/04/05 02:10 | Gengo Kikuchi v Shintaro Imai | 4-6,6-4,3-6 |
| ITF Japan F5 | 2017/04/03 02:45 | Shunrou Takeshima v Gengo Kikuchi | 0-6,4-6 |
| ITF Japan F4 | 2017/03/30 01:00 | Seong Chan Hong v Gengo Kikuchi | 6-3,6-3 |
| ITF Japan F4 | 2017/03/29 01:00 | Gengo Kikuchi v Kaito Itsusaki | 6-4,6-3 |
| ITF Japan F3 | 2017/03/22 00:30 | Yusuke Takahashi v Gengo Kikuchi | 6-3,6-1 |
| ITF Japan F2 | 2017/03/15 03:55 | Gengo Kikuchi v Ibuki Furuta | 0-6,6-3,3-6 |
| ITF Japan F2 | 2017/03/14 06:05 | Gengo Kikuchi v Koichi Sano | 6-2,6-4 |
| 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 |
| ITF China F5 | 2017/04/15 05:35 | Bradley Mousley v Shuichi Sekiguchi | 7-6,7-6 |
| ITF China F5 | 2017/04/13 05:05 | Tsung-Hua Yang v Shuichi Sekiguchi | 2-6,4-6 |