Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Chengdu | 2018/07/31 06:25 | Yusuke Takahashi v James Ward | 3-6,3-6 |
| Challenger Granby | 2018/07/24 18:50 | Yusuke Takahashi v Peter Polansky | 4-6,1-6 |
| Challenger Gatineau | 2018/07/17 14:00 | Yusuke Takahashi v Go Soeda | 4-6,3-6 |
| Challenger Winnipeg | 2018/07/10 15:00 | Yusuke Takahashi v Jason Kubler | 2-6,2-6 |
| Challenger Fergana | 2018/06/18 09:05 | Yusuke Takahashi v Duckhee Lee | 6-7,1-6 |
| Challenger Almaty | 2018/06/13 05:00 | Yusuke Takahashi v Roberto Cid Subervi | 1-6,0-6 |
| 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 Chengdu Qual | 2018/07/29 05:40 | Hiroyasu Ehara v Blake Ellis | 3-6,3-6 |
| Challenger Chengdu Qual | 2018/07/28 08:05 | Hiroyasu Ehara v Runhao Hua | 7-5,4-6,7-6 |
| Challenger Astana | 2018/07/17 06:05 | Hiroyasu Ehara v Ivan Gakhov | 3-6,6-7 |
| ITF Guam F1 | 2018/06/23 00:00 | Hiroyasu Ehara v Yuta Shimizu | 6-3,2-6,3-6 |
| ITF Guam F1 | 2018/06/22 00:00 | Hiroyasu Ehara v Sho Katayama | 7-6,6-4 |
| ITF Guam F1 | 2018/06/20 02:00 | Hiroyasu Ehara v Naru Shirafuji | 6-4,6-3 |
| ITF Guam F1 | 2018/06/18 02:10 | Hiroyasu Ehara v Ren Nakamura | 6-4,6-4 |
| ITF China F8 | 2018/06/09 05:15 | Hiroyasu Ehara v Zhe Li | 3-6,6-7 |