Round: 25 Ground: Synthetic outdoor
| ITF Singapore F2 | 2017/05/31 05:25 | Hiroyasu Ehara v Raymond Sarmiento | 2-6,3-6 |
| ITF Singapore F1 | 2017/05/28 05:00 | Dayne Kelly v Hiroyasu Ehara | 3-6,3-6 |
| ITF Singapore F1 | 2017/05/26 03:00 | Sho Katayama v Hiroyasu Ehara | 3-6,6-4,2-6 |
| ITF Singapore F1 | 2017/05/25 02:00 | Hiroyasu Ehara v Masato Shiga | 6-1,6-0 |
| ITF Singapore F1 | 2017/05/23 04:10 | Sem Verbeek v Hiroyasu Ehara | 6-7,1-6 |
| Challenger Gimcheon Qual | 2017/04/29 05:10 | Takuto Niki v Hiroyasu Ehara | 6-1,6-4 |
| ITF Japan F5 | 2017/04/03 03:20 | Sho Shimabukuro v Hiroyasu Ehara | 6-1,6-7,6-3 |
| ITF Japan F4 | 2017/03/29 03:40 | Hiroyasu Ehara v Sho Katayama | 2-6,4-6 |
| 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 |
| ITF China F5 | 2017/04/15 05:35 | Bradley Mousley v Shuichi Sekiguchi | 7-6,7-6 |