Stadium: Court 9 Round: 44 Ground: Clay
| ITF Kazakhstan F4 Qual | 2018/04/14 09:15 | Yusei Fukuoka v Tamerlan Kalkenov | 6-1,6-1 |
| ITF Japan F6 Qual | 2018/04/07 03:30 | Yusei Fukuoka v Rimpei Kawakami | 1-6,0-6 |
| ITF Greece F5 | 2018/03/24 10:00 | Yusei Fukuoka v Marvin Schramm | 4-6,5-7 |
| ITF Greece F4 | 2018/03/17 07:30 | Yusei Fukuoka v Andrej Glvac | 2-6,3-6 |
| ITF Greece F3 | 2018/03/10 10:00 | Yusei Fukuoka v Leevi Saatela | 4-6,1-6 |
| ITF Greece F2 | 2018/03/04 09:30 | Yusei Fukuoka v Ondrej Krstev | 2-6,4-6 |
| ITF Greece F2 | 2018/03/03 07:30 | Alexey Dubinin v Yusei Fukuoka | 1-6,1-6 |
| ITF Greece F1 | 2018/02/24 11:00 | Yusei Fukuoka v Athanasios Bilis | 1-6,6-4,6-7 |
| ITF Kazakhstan F3 Qual | 2018/04/09 04:00 | Daniil Klimov v Yahor Yatsyk | 6-3,6-4 |
| ITF Kazakhstan F3 Qual | 2018/04/08 14:15 | Damir Makhmudov v Yahor Yatsyk | 1-6,0-6 |
| ITF Spain F2 | 2018/01/20 11:00 | Yahor Yatsyk v Andrey Chepelev | 2-6,1-6 |
| ITF Spain F1 | 2018/01/15 09:00 | Jonas Trinker v Yahor Yatsyk | 6-4,3-6,3-6 |
| ITF Spain F1 | 2018/01/14 09:00 | Carlos V Martinez v Yahor Yatsyk | 5-7,2-6 |
| ITF Spain F1 | 2018/01/13 09:00 | Antonio M-Hidalgo v Yahor Yatsyk | 6-4,1-6,2-6 |
| ITF Brazil F4 | 2017/11/27 11:00 | Igor Gimenez v Yahor Yatsyk | 6-2,2-6,6-4 |
| ITF Brazil F4 | 2017/11/26 13:00 | Hugo Moura v Yahor Yatsyk | 1-6,0-6 |