Stadium: Court 8 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Nonthaburi | 2019/11/25 03:50 | Natthasith Kunsuwan v Daisuke Sumizawa | 7-6,6-7,9-11 |
| ITF Thailand F6 | 2018/10/08 02:30 | Natthasith Kunsuwan v Daisuke Sumizawa | 2-6,2-6 |
| ITF M15 Ulcinj | 2021/09/15 13:15 | Daisuke Sumizawa v Juan Pablo Paz | 4-6,2-6 |
| ITF M15 Ulcinj | 2021/09/13 13:00 | Daisuke Sumizawa v Deney Wassermann | 6-4,7-6 |
| ITF M15 Ulcinj | 2021/09/13 08:00 | Daisuke Sumizawa v Nicolo Inserra | 6-4,6-0 |
| ITF M15 Ulcinj | 2021/09/09 12:15 | Daisuke Sumizawa v Bastian Malla | 6-4,1-6,0-6 |
| ITF M15 Ulcinj | 2021/09/06 13:00 | Daisuke Sumizawa v Alessandro Procopio | 6-2,6-2 |
| ITF M15 Ulcinj | 2021/09/06 07:30 | Daisuke Sumizawa v Eric Morris | 7-6,6-1 |
| ITF M15 Cairo | 2021/08/04 12:45 | Daisuke Sumizawa v Ignacio Monzon | 3-6,1-6 |
| ITF M15 Cairo | 2021/07/28 09:40 | Luca Tomasetto v Daisuke Sumizawa | 4-6,6-1,6-1 |
| ITF M15 Monastir | 2021/09/14 08:00 | Paras Dahiya v Natthasith Kunsuwan | 7-5,6-2 |
| ITF M15 Monastir | 2021/09/13 08:00 | Andres Haefele v Natthasith Kunsuwan | 1-6,4-6 |
| ITF M15 Doha | 2020/03/11 13:55 | Daniil Glinka v Natthasith Kunsuwan | 6-4,5-7,6-4 |
| ITF M15 Doha | 2020/03/10 12:00 | Natthasith Kunsuwan v Mihnea L.S. Turcu | 7-6,6-3 |
| ITF M25 Nonthaburi | 2020/02/03 04:15 | Cheong-Eui Kim v Natthasith Kunsuwan | 7-6,6-2 |
| ITF M25 Nonthaburi | 2020/02/02 02:30 | Natthayut Nithithananont v Natthasith Kunsuwan | 5-7,1-6 |
| 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 |