Round: 62 Ground: Clay
| ITF Germany F4 | 2017/06/17 14:00 | Yohei Otsuka v Leonard Von Hindte | 3-6,1-6 |
| ITF Turkey F18 | 2017/05/07 07:00 | Goran Markovic v Yohei Otsuka | 7-6,6-1 |
| ITF Turkey F18 | 2017/05/06 07:00 | Bekir Berk Sahin v Yohei Otsuka | 2-6,0-6 |
| ITF Turkey F17 | 2017/04/30 07:00 | Yohei Otsuka v Michiel de Krom | 2-6,2-6 |
| ITF Turkey F16 | 2017/04/22 06:00 | Yohei Otsuka v Daniel Mora | 0-6,1-6 |
| ITF Japan F3 | 2017/03/18 00:30 | Yohei Otsuka v Zhaoyi Cao | 1-6,3-6 |
| ITF Japan F1 | 2017/03/05 01:00 | Yohei Ono v Yohei Otsuka | 6-3,6-3 |
| ITF Japan F8 | 2016/06/12 01:00 | Yutaro Matsuzaki v Yohei Otsuka | 6-2,6-2 |
| ITF Germany F4 | 2017/06/17 08:00 | Leon Hoeveler v Alexander Abou Boutros | 6-0,6-3 |
| ITF Germany F16 | 2016/10/23 13:00 | Alexander Abou Boutros v Gijs Buntsma | 2-6,0-6 |
| ITF Germany F16 | 2016/10/23 07:30 | Lorenzo Gobet v Alexander Abou Boutros | 2-6,6-2,4-6 |