Results
| ITF M25 Sapporo | 09/08 03:10 | - | Daisuke Sumizawa v Sho Katayama | 2-6,1-6 | |
| ITF M25 Sapporo | 09/04 01:00 | - |
Daisuke Sumizawa v
Charles Broom
|
2-6,2-6 | |
| ITF M25 Sapporo | 09/02 01:00 | - | Yusuke Kusuhara v Daisuke Sumizawa | 1-6,4-5 | |
| ITF M25 Taipei | 08/28 04:01 | - | Daisuke Sumizawa v Yanki Erel | 2-6,2-6 | |
| ITF M25 Taipei | 08/26 04:06 | - | Daisuke Sumizawa v Adrian Arcon | 2-6,6-4,5-0 | |
| ITF M15 Nakhon Pathom | 08/20 04:30 | - | Junhyeon Lee v Daisuke Sumizawa | 3-6,6-4,6-1 | |
| ITF M15 Wuning | 08/02 10:00 | - | Daisuke Sumizawa v Yuta Kikuchi | 3-6,2-6 | |
| ITF M15 Wuning | 08/01 10:00 | - | Tianhui Zhang v Daisuke Sumizawa | 6-3,2-6,0-3 | |
| ITF M15 Wuning | 07/31 12:10 | - | Makoto Ochi v Daisuke Sumizawa | 3-6,6-4,5-7 | |
| ITF M15 Wuning | 07/30 12:24 | - | Yuya Hirose v Daisuke Sumizawa | 3-6,1-6 | |
| ITF M15 Wuning | 07/27 01:00 | - | Sanhui Shin v Daisuke Sumizawa | 6-4,6-0 | |
| ITF M15 Wuning | 07/26 01:00 | - | Daisuke Sumizawa v Fnu Nidunjianzan | 7-6,6-1 |
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