Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF Thailand F8 | 2018/11/03 06:00 | Yeongseok Jeong v Natthasith Kunsuwan | 6-2,4-6,6-4 |
| Challenger Shenzhen 2 | 2018/10/27 07:30 | Saketh Myneni v Natthasith Kunsuwan | 6-4,7-5 |
| ITF Thailand F6 | 2018/10/08 02:30 | Natthasith Kunsuwan v Daisuke Sumizawa | 2-6,2-6 |
| ITF Thailand F6 | 2018/10/06 05:30 | Natthasith Kunsuwan v Daniel Kossek | 6-4,6-7,6-4 |
| ITF Thailand F5 | 2018/09/30 02:30 | Seung-Hun Shin v Natthasith Kunsuwan | 7-6,6-1 |
| ITF Thailand F5 | 2018/09/29 02:30 | Bingyu Yu v Natthasith Kunsuwan | 6-3,3-6,3-6 |
| ITF Thailand F4 | 2018/09/24 02:30 | Natthasith Kunsuwan v Tsung-Hao Huang | 6-7,5-7 |
| ITF Thailand F3 | 2018/09/04 07:45 | Soichiro Moritani v Natthasith Kunsuwan | 6-2,6-2 |
| ITF Thailand F8 | 2018/11/04 02:00 | Robert Strombachs v Sebastian Prechtel | 3-6,3-6 |
| ITF Vietnam F5 | 2018/11/02 03:00 | Robert Strombachs v Nam Hoang Ly | 4-6,2-6 |
| ITF Vietnam F5 | 2018/11/01 03:00 | Robert Strombachs v Samuel Shropshire | 6-7,6-1,6-1 |
| ITF Vietnam F5 | 2018/10/30 03:00 | Robert Strombachs v Nitin Kumar Sinha | 6-1,6-4 |
| ITF Vietnam F4 | 2018/10/25 04:30 | Robert Strombachs v Yu Hsiou Hsu | 6-4,0-6,5-7 |
| ITF Vietnam F4 | 2018/10/24 02:30 | Aryan Goveas v Robert Strombachs | 6-3,5-7,1-6 |
| ITF Vietnam F4 | 2018/10/22 05:10 | Robert Strombachs v Jackson Varney | 7-6,6-1 |
| ITF Vietnam F4 | 2018/10/21 03:00 | Robert Strombachs v Shamirul S Mohd Adam Das | 6-2,6-1 |