Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| ITF M25 Nonthaburi | 2020/02/02 02:30 | Natthayut Nithithananont v Natthasith Kunsuwan | 5-7,1-6 |
| ITF M15 Chiang Rai | 2022/04/27 08:20 | Kazuma Kawachi v Natthasith Kunsuwan | 6-3,6-1 |
| ITF M15 Chiang Rai | 2022/04/18 02:00 | Natthasith Kunsuwan v Thantub Suksumrarn | 7-5,3-6,9-11 |
| ITF M15 Chiang Rai - kvalifikace | 2022/04/17 02:00 | Kazuma Kawachi v Natthasith Kunsuwan | 6-3,6-7,7-10 |
| ITF M15 Chiang Rai - kvalifikace | 2022/04/10 04:20 | Natthasith Kunsuwan v Digvijay Pratap Singh | 7-6,0-6,10-12 |
| ITF M25 Monastir | 2022/03/28 09:00 | Alexis Boureau v Natthasith Kunsuwan | 6-3,6-0 |
| ITF M25 Monastir | 2022/03/27 10:00 | Natthasith Kunsuwan v Filippo Martini | 6-3,6-2 |
| ITF M25 Monastir | 2022/03/22 10:30 | Natthasith Kunsuwan v Pietro Pampanin | 6-4,4-6,1-10 |
| ITF M15 Monastir | 2021/10/25 10:00 | Natthasith Kunsuwan v Xian Yao Zhou | 3-6,6-7 |
| ITF M25 Chiang Rai | 2022/05/29 07:05 | Teerapat Khantiweerawat v Natthayut Nithithananont | 4-6,4-6 |
| ITF M15 Chiang Rai | 2022/04/25 01:50 | Rishab Agarwal v Natthayut Nithithananont | 6-1,6-2 |
| ITF M15 Chiang Rai - kvalifikace | 2022/04/24 01:55 | Natthayut Nithithananont v Taentawan T M Maggioli | 1-6,6-2,10-8 |
| ITF M15 Chiang Rai - kvalifikace | 2022/04/17 03:00 | Natthayut Nithithananont v Suphawat Saeoui | 3-6,0-6 |
| ITF M15 Chiang Rai | 2022/04/03 03:10 | Natthayut Nithithananont v Gunjan Jadhav | 1-6,3-6 |
| ITF M15 Monastir | 2021/12/05 11:30 | Alessandro Bellifemine v Natthayut Nithithananont | 6-1,6-0 |
| ITF M15 Monastir | 2021/11/28 09:30 | Antoine Berger v Natthayut Nithithananont | 7-5,6-1 |
| ITF M15 Monastir | 2021/11/21 11:00 | Shohei Chikami v Natthayut Nithithananont | 6-2,6-0 |