Stadium: Court 2 Round: 26 Ground: Clay
| Challenger Almaty Qual | 2018/06/11 04:00 | Yusuke Takahashi v Gerard Granollers-Pujol | 5-7,0-6 |
| Challenger Almaty Qual | 2018/06/10 06:35 | Yusuke Takahashi v Pavel Kotov | 7-5,3-6,6-3 |
| Challenger Almaty Qual | 2018/06/09 07:20 | Yusuke Takahashi v Sidharth Rawat | 7-6,6-2 |
| Challenger Busan | 2018/05/14 07:45 | Yusuke Takahashi v Duckhee Lee | 2-6,1-6 |
| 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 Almaty | 2018/06/12 07:40 | Duckhee Lee v Roberto Cid Subervi | 5-7,5-7 |
| Challenger Shymkent | 2018/06/09 05:00 | Yannick Hanfmann v Roberto Cid Subervi | 7-6,4-6,6-2 |
| Challenger Shymkent | 2018/06/08 05:00 | Roberto Cid Subervi v Hugo Dellien | 6-7,6-4,6-1 |
| Challenger Shymkent | 2018/06/07 06:00 | Roberto Cid Subervi v Sebastian Ofner | 6-2,6-1 |
| Challenger Shymkent | 2018/06/06 06:55 | Nino Serdarusic v Roberto Cid Subervi | 2-6,4-6 |
| Challenger Shymkent | 2018/06/04 08:05 | Roberto Cid Subervi v Tsung-Hua Yang | 1-6,6-0,6-1 |
| Challenger Puerto Vallarta | 2018/05/03 23:25 | Adrian Menendez-Maceiras v Roberto Cid Subervi | 6-4,7-6 |
| Challenger Puerto Vallarta | 2018/05/01 17:00 | Alejandro Gonzalez v Roberto Cid Subervi | 2-6,7-5,2-6 |