Stadium: Court 5 Round: 44 Ground: Hardcourt outdoor
| ITF M25 Nonthaburi | 2020/01/26 05:00 | Natthayut Nithithananont v Jirat Navasirisomboon | 6-4,4-6,7-10 |
| ITF M15 Nonthaburi | 2019/12/04 02:30 | Natthayut Nithithananont v Thomas Fancutt | 1-6,4-6 |
| ITF M15 Nonthaburi | 2019/11/24 06:50 | Natthayut Nithithananont v Vorachon Rakpuangchon | 6-7,6-1,9-11 |
| ITF Thailand F6 Qual | 2017/08/12 07:45 | Nino Portales v Natthayut Nithithananont | 6-1,6-2 |
| ITF M25 Nonthaburi | 2020/01/26 04:05 | Natthasith Kunsuwan v Cheong-Eui Kim | 6-7,3-6 |
| Challenger Bangkok 2 | 2020/01/20 03:00 | Aslan Karatsev v Natthasith Kunsuwan | 6-4,6-3 |
| ITF M15 Hongkong | 2020/01/06 02:00 | Wei-De Lin v Natthasith Kunsuwan | 6-1,3-6,10-6 |
| ITF M15 Nonthaburi | 2019/12/03 04:35 | Qun Gao v Natthasith Kunsuwan | 6-3,6-1 |
| ITF M15 Nonthaburi | 2019/12/02 02:30 | Sergey Shipilov v Natthasith Kunsuwan | 1-6,7-6,5-10 |
| ITF M15 Nonthaburi - kvalifikace | 2019/12/01 06:10 | Natthasith Kunsuwan v Rishi Reddy | 6-4,6-0 |
| ITF M15 Nonthaburi | 2019/11/25 03:50 | Natthasith Kunsuwan v Daisuke Sumizawa | 7-6,6-7,9-11 |
| ITF M15 Nonthaburi | 2019/11/24 06:45 | Natthasith Kunsuwan v Thanapet Chanta | 7-6,4-6,10-3 |