Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Kunshan | 2019/07/02 10:35 | Pol Wattanakul v Daisuke Sumizawa | 1-6,6-2,3-6 |
| 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 Kunshan | 2019/07/03 03:45 | Jurence Zosimo Mendoza v Haitong Xia | 3-6,6-4,1-6 |
| ITF M25 Kunshan | 2019/07/02 01:30 | Haitong Xia v Lukas Krainer | 7-6,6-3 |
| ITF M25 Kunshan | 2019/07/01 07:50 | Haitong Xia v Zhenxiong Dong | 6-2,6-1 |
| ITF M25 Shenzhen | 2019/06/10 05:15 | Haitong Xia v Chuhan Wang | 2-6,3-6 |
| ITF M25 Luzhou | 2019/05/30 04:30 | Haitong Xia v Xin Gao | 1-6,2-6 |
| ITF M25 Luzhou | 2019/05/29 02:00 | Haitong Xia v Li-Wei Tan | 6-3,6-3 |
| ITF M25 Luzhou | 2019/05/28 03:20 | Haitong Xia v Linang Xiao | 2-6,6-1,10-7 |
| ITF M25 Luzhou | 2019/05/27 02:00 | Haitong Xia v Naifu Zhang | 6-2,6-1 |