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