Stadium: Court 1 Round: 44
| Challenger Lima | 2018/10/22 17:55 | Guilherme Clezar v Kento Tagashira | 6-0,6-0 |
| Challenger Banja Luka | 2018/09/11 08:00 | Kento Tagashira v Cristian Garin | 0-6,1-6 |
| ITF Ecuador F2 Qual | 2018/07/29 18:00 | Kento Tagashira v Juan R Bisono | 0-6,2-6 |
| ITF Ecuador F1 | 2018/07/24 20:35 | Kento Tagashira v Emilio Gomez | 1-6,1-6 |
| ITF China F11 Qual | 2018/07/14 01:00 | Owen Lu v Kento Tagashira | 6-3,6-2 |
| ITF Guam F1 | 2018/06/17 01:00 | Jeremy Sonkin v Kento Tagashira | 6-1,6-1 |
| ITF Japan F8 | 2018/06/09 01:00 | Takuya Kumasaka v Kento Tagashira | 7-6,6-0 |
| ITF China F8 | 2018/06/05 03:40 | Wishaya Trongcharoenchaikul v Kento Tagashira | 6-1,6-2 |
| ITF Tunisia F38 | 2018/10/30 08:30 | Sergey Dorozhkin v Ronan Joncour | 2-6,0-6 |
| ITF Tunisia F37 | 2018/10/21 08:30 | Sergey Dorozhkin v Ivan Denisov | 2-6,1-6 |
| ITF Tunisia F36 | 2018/10/13 08:30 | Sergey Dorozhkin v Alexander Ovcharov | 0-6,3-6 |
| ITF Kazakhstan F8 | 2018/09/22 05:55 | Bekzat Usipbekov v Sergey Dorozhkin | 6-1,6-3 |
| ITF Kazakhstan F7 | 2018/09/16 08:10 | Sanetulla Kutybaev v Sergey Dorozhkin | 6-2,6-2 |
| ITF Switzerland F4 | 2018/08/25 07:00 | Bastian Parada v Sergey Dorozhkin | 7-5,7-5 |
| ITF Russia F7 | 2018/08/18 07:00 | Alexander Shevchenko v Sergey Dorozhkin | 6-2,6-1 |
| ITF Russia F5 Qual | 2018/08/06 08:35 | Nikita Tatyanin v Sergey Dorozhkin | 6-2,6-2 |