Stadium: Court 12 Round: 25 Ground: Hardcourt outdoor
| Challenger Gimcheon | 2018/05/09 03:50 | Yusuke Takahashi v Go Soeda | 6-7,2-6 |
| Challenger Gimcheon | 2018/05/07 08:15 | Uisung Park v Yusuke Takahashi | 5-7,2-6 |
| Challenger Seoul | 2018/05/01 05:00 | Kamil Majchrzak v Yusuke Takahashi | 6-2,6-3 |
| Challenger Taipei | 2018/04/11 10:55 | Yusuke Takahashi v Chien Hsun Lo | 3-6,7-6,3-6 |
| Challenger Taipei | 2018/04/10 10:00 | Chun Hsin Tseng v Yusuke Takahashi | 6-7,1-6 |
| ITF Japan F5 | 2018/04/08 03:05 | Zhe Li v Yusuke Takahashi | 6-4,6-7,7-5 |
| ITF Japan F5 | 2018/04/05 02:00 | Shinji Hazawa v Yusuke Takahashi | 5-7,0-6 |
| ITF Japan F5 | 2018/04/04 05:10 | Naoki Tajima v Yusuke Takahashi | 4-6,2-6 |
| Challenger Glasgow | 2018/05/03 15:00 | James Ward v Harri Heliovaara | 5-7,4-6 |
| Challenger Glasgow | 2018/05/02 10:40 | Kaichi Uchida v James Ward | 4-6,6-7 |
| Challenger Leon | 2018/04/26 22:05 | James Ward v Filip Peliwo | 2-6,4-6 |
| Challenger Leon | 2018/04/24 21:20 | James Ward v Jose Antonio Rodriguez Rodriguez | 6-2,6-0 |
| Challenger Leon Qual | 2018/04/23 16:00 | James Ward v Viktor Durasovic | 7-6,6-3 |
| Challenger Leon Qual | 2018/04/22 16:00 | Federico Gaio v James Ward | 6-3,5-7,4-6 |
| Challenger Leon Qual | 2018/04/21 15:00 | James Ward v Nicolas Barrientos | 6-1,7-6 |
| Challenger Guadalajara | 2018/04/17 17:00 | James Ward v Manuel Sanchez | 4-6,7-6,3-6 |