Stadium: Court 8 Round: 44 Ground: Hardcourt outdoor
| ITF Thailand F6 | 2018/10/08 02:30 | Natthasith Kunsuwan v Daisuke Sumizawa | 2-6,2-6 |
| ITF M15 Nonthaburi | 2019/11/24 06:45 | Natthasith Kunsuwan v Thanapet Chanta | 7-6,4-6,10-3 |
| ITF M15 Nanchang | 2019/10/03 05:00 | Natthasith Kunsuwan v Taisei Ichikawa | 0-6,6-7 |
| ITF M15 Nanchang | 2019/10/02 05:15 | Natthasith Kunsuwan v Haitong Xia | 3-6,7-6,6-2 |
| ITF M15 Nanchang | 2019/09/30 07:40 | Zhao Zhao v Natthasith Kunsuwan | 1-6,6-1,7-10 |
| ITF M15 Nanchang | 2019/09/30 02:00 | Amit Beniwal v Natthasith Kunsuwan | 3-6,1-6 |
| ITF M15 Nanchang | 2019/09/29 02:00 | Baoluo Zheng v Natthasith Kunsuwan | 2-6,3-6 |
| ITF M15 Nanchang | 2019/09/23 02:00 | Kousuke Ogura v Natthasith Kunsuwan | 6-1,6-1 |
| ITF M15 Nanchang | 2019/09/22 02:00 | Jing Ke Chen v Natthasith Kunsuwan | 4-6,1-6 |
| ITF M15 Nonthaburi | 2019/11/24 09:00 | Noppadol Noikor v Daisuke Sumizawa | 2-6,5-7 |
| Challenger Pune | 2019/11/11 12:30 | Dhruv Sunish v Daisuke Sumizawa | 7-6,6-2 |
| ITF M15 Meshref | 2019/11/06 09:40 | Daisuke Sumizawa v Alec Adamson | 2-6,2-6 |
| ITF M25 Tay Ninh | 2019/10/11 03:00 | Daisuke Sumizawa v Billy Harris | 2-6,4-6 |
| ITF M25 Tay Ninh | 2019/10/09 02:00 | Daisuke Sumizawa v Krittin Koaykul | 6-3,6-2 |
| ITF M25 Tay Ninh | 2019/10/08 02:00 | Daisuke Sumizawa v Qun Gao | 6-2,7-6 |
| ITF M25 Tay Ninh Qual | 2019/10/07 02:00 | Daisuke Sumizawa v Jagmeet Singh | 6-1,6-0 |
| ITF M15 Nanchang | 2019/10/03 03:40 | Chukang Wang v Daisuke Sumizawa | 6-4,2-6,6-4 |