Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Nonthaburi | 2019/07/23 03:45 | Daisuke Sumizawa v Krittin Koaykul | 6-4,1-6,11-9 |
| ITF M25 Tây 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 |
| ITF M15 Nanchang | 2019/10/02 08:30 | Anirudh Chandrasekar v Daisuke Sumizawa | 6-3,2-6,1-6 |
| ITF M15 Nanchang | 2019/09/24 06:50 | Daisuke Sumizawa v Vladimir Ivanov | 2-6,2-6 |
| ITF M25 Nonthaburi | 2019/07/31 06:20 | Marsel Ilhan v Daisuke Sumizawa | 6-4,6-2 |
| ITF M25 Nonthaburi | 2019/07/30 02:30 | Daisuke Sumizawa v Cameron Green | 6-4,5-7,10-8 |
| ITF M25 Nonthaburi | 2019/07/29 05:00 | Daisuke Sumizawa v Hao Yuan Ng | 2-6,6-3,10-6 |
| ITF M25 Tây Ninh | 2019/10/08 02:00 | Huynh Thinh v Krittin Koaykul | 4-6,2-6 |
| ITF M25 Tay Ninh Qual | 2019/10/07 03:30 | Tu Le Khanh Duy v Krittin Koaykul | 3-6,6-7 |
| ITF M25 Tay Ninh Qual | 2019/10/06 06:30 | Ao Shen v Krittin Koaykul | 4-6,1-6 |
| ITF M25 Tây Ninh | 2019/10/02 04:25 | Manish Sureshkumar v Krittin Koaykul | 6-0,6-3 |
| ITF M25 Tây Ninh | 2019/10/01 03:35 | Kuan Yu Chen v Krittin Koaykul | 6-7,6-2,6-10 |
| ITF M25 Tây Ninh | 2019/09/30 06:00 | Quoc Uy Vo v Krittin Koaykul | 2-6,3-6 |
| ITF M15 Hua Hin | 2019/09/02 05:45 | Krittin Koaykul v Nitin Kumar Sinha | 3-6,2-6 |
| ITF M15 Hua Hin | 2019/08/19 05:15 | Krittin Koaykul v Kittirat Kerdlaphee | 6-4,1-6,15-13 |