Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF Tunisia F29 | 2018/08/27 09:30 | Flaherty, Max v Otsuka, Yohei | 6-3,7-5 |
| ITF Spain F24 | 2018/08/18 09:00 | Anton Talaya, Carles v Otsuka, Yohei | 6-2,6-1 |
| ITF Spain F23 | 2018/08/12 10:00 | Otsuka, Yohei v Fernandez, Pol | 3-6,6-7 |
| ITF Spain F23 | 2018/08/11 11:30 | Otsuka, Yohei v Spelta, Tommaso | 6-1,6-1 |
| ITF Spain F21 Qual | 2018/07/28 07:00 | Otsuka, Yohei v Turegano Julian, Ernesto | 2-6,2-6 |
| ITF Georgia F2 | 2018/07/14 05:00 | Otsuka, Yohei v Blokhin, Roman | 4-6,6-1,4-6 |
| ITF Egypt F8 | 2018/03/03 08:00 | Otsuka, Yohei v Aidan Mchugh | 2-6,3-6 |
| Egypt F7, Singles Qualifying | 2018/02/24 12:30 | Jakub Paul v Otsuka, Yohei | 6-4,6-1 |
| ITF Spain F28 Qual | 2018/09/15 15:30 | Sergi Perez Contri v Tatyanin, Nikita | 7-6,4-6,7-5 |
| Russia F8, Singles Qualifying | 2018/08/25 10:00 | Budanov, Andrey v Tatyanin, Nikita | 6-4,6-2 |
| ITF Russia F7 | 2018/08/19 07:00 | Baluda, Victor v Tatyanin, Nikita | 6-2,7-6 |
| ITF Russia F6 | 2018/08/11 07:00 | Sokolovskiy, Mikhail v Tatyanin, Nikita | 6-2,6-7,6-0 |
| ITF Russia F5 | 2018/08/07 09:30 | Tatyanin, Nikita v Igoshin, Alexander | 2-6,3-6 |
| ITF Russia F5 Qual | 2018/08/06 08:35 | Tatyanin, Nikita v Dorozhkin, Sergey | 6-2,6-2 |
| ITF Russia F5 Qual | 2018/08/05 11:30 | Tatyanin, Nikita v Ivanov, Vladislav | 6-4,7-6 |
| ITF Russia F4 | 2018/07/31 10:25 | Uvarov, Andrey v Tatyanin, Nikita | 3-6,6-3,6-3 |