Stadium: Court 3 Round: 54
| ITF Vietnam F1 | 2018/04/29 05:30 | Jirat Navasirisomboon v Daisuke Sumizawa | 6-2,6-1 |
| ITF Vietnam F1 | 2018/04/29 05:30 | Jirat Navasirisomboon v Daisuke Sumizawa | 6-2,6-1 |
| ITF Vietnam F1 | 2018/04/28 05:00 | Yuttana Charoenphon v Daisuke Sumizawa | 4-6,2-6 |
| ITF Japan F6 Qual | 2018/04/08 04:00 | Aoran Wang v Daisuke Sumizawa | 6-2,6-2 |
| ITF Japan F5 | 2018/03/31 00:30 | Gengo Kikuchi v Daisuke Sumizawa | 6-1,6-3 |
| ITF Turkey F11 | 2018/03/18 07:00 | Marc Fornell-Mestres v Daisuke Sumizawa | 6-4,6-4 |
| ITF Turkey F11 | 2018/03/17 08:30 | Samuel Bothwell v Daisuke Sumizawa | 0-6,4-6 |
| ITF Turkey F10 | 2018/03/10 08:30 | Gabriel Donev v Daisuke Sumizawa | 6-3,6-3 |
| ITF Turkey F9 | 2018/03/04 08:30 | Daisuke Sumizawa v Neven Krivokuca | 1-6,2-6 |
| ITF Vietnam F1 | 2018/05/02 04:25 | Jirat Navasirisomboon v Chun Hsin Tseng | 6-7,2-6 |
| ITF Vietnam F1 | 2018/04/30 03:00 | Soichiro Moritani v Jirat Navasirisomboon | 2-6,4-6 |
| ITF Vietnam F1 | 2018/04/29 05:30 | Jirat Navasirisomboon v Daisuke Sumizawa | 6-2,6-1 |
| Davis Cup | 2018/04/07 02:00 | Jeson Patrombon v Jirat Navasirisomboon | 6-2,6-2 |
| Davis Cup | 2018/02/04 07:45 | Yasitha De Silva v Jirat Navasirisomboon | 5-7,2-6 |
| Davis Cup | 2018/02/03 04:00 | Sharmal Dissanayake v Jirat Navasirisomboon | 6-4,7-5 |
| ITF Thailand F12 Qual | 2017/12/09 06:30 | Jirat Navasirisomboon v Tihomir Grozdanov | 3-6,5-7 |
| ITF Thailand F11 Qual | 2017/12/03 03:00 | Florian Fallert v Jirat Navasirisomboon | 6-4,6-3 |