Stadium: Court A Round: 44
| ITF Thailand F2 | 2018/08/28 02:00 | Natthasith Kunsuwan v Dayne Kelly | 3-6,1-6 |
| ITF Thailand F1 | 2018/08/22 03:30 | Natthasith Kunsuwan v Thomas Fancutt | 2-6,5-7 |
| ITF Thailand F1 | 2018/08/21 07:10 | Natthasith Kunsuwan v Hao Yuan Ng | 6-2,7-5 |
| ITF Thailand F1 | 2018/08/20 06:25 | Natthasith Kunsuwan v Amaury De Beer | 6-0,6-2 |
| ITF Thailand F1 | 2018/08/19 02:00 | Natthasith Kunsuwan v Nutdanai Sincharoenwattana | 6-0,6-3 |
| ITF Indonesia F3 Qual | 2018/08/04 07:00 | Natthasith Kunsuwan v Jirat Navasirisomboon | 4-6,6-3,1-6 |
| ITF China F11 | 2018/07/17 01:00 | Natthasith Kunsuwan v Mitchell Thomas McDaniels | 6-4,1-6,1-6 |
| ITF China F10 Qual | 2018/07/07 05:00 | Natthasith Kunsuwan v Kousuke Ogura | 6-7,4-6 |
| ITF Thailand F3 | 2018/09/01 02:00 | Chanon Phunsawat v Nawakarn Khunjan | 3-6,2-6 |
| ITF Thailand F1 | 2018/08/22 04:50 | Nawakarn Khunjan v Patrik Rikl | 2-6,2-6 |
| ITF Thailand F1 | 2018/08/21 06:35 | Nawakarn Khunjan v Akanit Pumjit | 6-7,6-2,6-2 |
| ITF Thailand F1 | 2018/08/20 03:50 | Nawakarn Khunjan v Coleman Wong | 6-3,6-0 |
| ITF Thailand F1 | 2018/08/19 03:40 | Emmanuel Luria v Nawakarn Khunjan | 3-6,0-6 |
| ITF Thailand F1 | 2018/08/18 03:30 | Nawakarn Khunjan v Krittin Koaykul | 7-5,7-6 |
| ITF Malaysia F3 | 2018/07/15 02:00 | Nawakarn Khunjan v Bernardo A P E Oliveira | 4-6,3-6 |
| ITF Malaysia F2 | 2018/07/08 03:00 | Quentin Robert v Nawakarn Khunjan | 6-0,6-2 |