Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Singapore | 2019/06/05 03:40 | Kunal Anand v Pol Wattanakul | 6-0,6-3 |
| ITF M25 Nonthaburi | 2019/05/29 07:35 | Rishab Agarwal v Pol Wattanakul | 6-7,7-5,7-6 |
| ITF M25 Nonthaburi | 2019/05/21 09:15 | Pol Wattanakul v Yusuke Takahashi | 4-6,4-6 |
| ITF M15 Kashiwa | 2019/04/04 03:45 | Pol Wattanakul v Shintaro Imai | 0-6,0-6 |
| ITF M15 Kashiwa | 2019/04/02 06:05 | Pol Wattanakul v Seon Yong Han | 6-2,6-3 |
| ITF M15 Tsukuba | 2019/03/26 01:00 | Pol Wattanakul v Mark Whitehouse | 2-6,0-6 |
| ITF M15 Kofu | 2019/03/20 03:25 | Pol Wattanakul v Takuya Kumasaka | 6-3,1-6,3-6 |
| Challenger Bangkok | 2019/02/12 06:25 | Go Soeda v Pol Wattanakul | 6-3,6-3 |
| ITF M15 Anseong | 2019/06/25 02:45 | Uisung Park v Daisuke Sumizawa | 6-4,3-6,6-2 |
| ITF M15 Gimcheon | 2019/06/19 01:00 | Oh-Hee Kwon v Daisuke Sumizawa | 4-6,7-6,6-3 |
| ITF M15 Akishima | 2019/06/11 06:30 | Sho Shimabukuro v Daisuke Sumizawa | 6-4,6-3 |
| ITF M15 Karuizawa | 2019/05/30 01:00 | Daisuke Sumizawa v Soichiro Moritani | 2-6,6-4,6-7 |
| ITF M15 Karuizawa | 2019/05/28 01:00 | Daisuke Sumizawa v Yuichiro Inui | 6-4,7-6 |
| ITF M25 Luan | 2019/05/15 06:30 | Daisuke Sumizawa v Jie Cui | 4-6,2-6 |
| ITF M25 Luan | 2019/05/14 02:00 | Daisuke Sumizawa v Ruikai Wang | 6-4,6-3 |
| ITF M25 Wuhan | 2019/05/09 03:10 | Yan Bai v Daisuke Sumizawa | 6-3,6-1 |