Stadium: Court 4 Round: 54 Ground: Clay
| 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 Taipei | 2018/04/10 10:00 | Chun Hsin Tseng v Yusuke Takahashi | 6-7,1-6 |
| Challenger Almaty Qual | 2018/06/10 06:25 | Roman Khassanov v Gerard Granollers-Pujol | 4-6,1-6 |
| Challenger Almaty Qual | 2018/06/09 07:45 | Gerard Granollers-Pujol v Steven Diez | 7-6,6-3 |
| Challenger Shymkent Qual | 2018/06/03 04:00 | Kevin Krawietz v Gerard Granollers-Pujol | 6-3,3-6,6-3 |
| Challenger Shymkent Qual | 2018/06/02 04:00 | Gerard Granollers-Pujol v Ivan Gakhov | 7-6,6-4 |
| ATP Geneva Qual | 2018/05/19 12:10 | Gerard Granollers-Pujol v Dominik Koepfer | 2-6,0-6 |
| Challenger Lisbon Qual | 2018/05/13 10:00 | Juan Pablo Ficovich v Gerard Granollers-Pujol | 4-6,7-6,6-1 |
| Challenger Lisbon Qual | 2018/05/12 10:50 | Roberto Marcora v Gerard Granollers-Pujol | 5-7,6-7 |
| Challenger Glasgow | 2018/05/01 16:45 | Gerard Granollers-Pujol v Nikola Milojevic | 6-7,2-6 |