Stadium: Show court Round: 25 Ground: Hardcourt outdoor
| ITF Japan F7 | 2018/06/05 03:35 | Arata Onozawa v Takashi Saito | 6-7,4-6 |
| ITF Japan F7 Qual | 2018/06/03 01:00 | Arata Onozawa v Kousuke Ogura | 6-2,6-1 |
| ITF Japan F6 | 2018/04/12 01:00 | Arata Onozawa v Sora Fukuda | 6-7,6-4,1-6 |
| ITF Japan F6 | 2018/04/10 04:55 | Arata Onozawa v Aoran Wang | 6-4,6-4 |
| ITF Japan F6 Qual | 2018/04/09 02:50 | Kazuki Nishiwaki v Arata Onozawa | 7-5,6-3 |
| ITF Japan F3 | 2018/03/17 04:00 | Issei Okamura v Arata Onozawa | 7-6,6-0 |
| Challenger Kyoto Qual | 2018/02/17 06:55 | Cheong-Eui Kim v Arata Onozawa | 2-6,6-3,6-4 |
| ITF Vietnam F3 | 2017/11/23 03:00 | Arjun Kadhe v Arata Onozawa | 7-5,6-2 |
| ITF Portugal F9 | 2018/06/24 14:00 | Nuno Borges v Chun Hsin Tseng | 3-6,4-6 |
| ITF Portugal F9 | 2018/06/23 12:05 | Tiago Cacao v Chun Hsin Tseng | 3-6,6-7 |
| ITF Portugal F9 | 2018/06/22 17:00 | Chun Hsin Tseng v Javier Pulgar-Garcia | 6-0,6-4 |
| ITF Portugal F9 | 2018/06/20 09:00 | Chun Hsin Tseng v Goncalo Falcao | 6-4,6-3 |
| ITF Portugal F9 | 2018/06/18 13:50 | Chun Hsin Tseng v Tomas Almeida | 6-3,6-4 |
| ITF Vietnam F2 | 2018/05/12 03:00 | Rio Noguchi v Chun Hsin Tseng | 7-5,6-2 |
| ITF Vietnam F2 | 2018/05/11 03:00 | Chun Hsin Tseng v Kazuki Nishiwaki | 6-3,3-6,6-3 |
| ITF Vietnam F2 | 2018/05/09 03:00 | Alexios Halebian v Chun Hsin Tseng | 0-6,6-3,4-6 |