| ITF Malaysia F3 | 10/29 00:00 | 62 | Daisuke Sumizawa v Rio Noguchi | 3-6,6-7 | |
| ITF Malaysia F2 | 10/23 01:00 | 62 | Tyler Lu v Daisuke Sumizawa | 6-1,6-4 | |
| ITF Malaysia F2 | 10/22 03:00 | 62 | Daisuke Sumizawa v Sam Matheson | 6-4,6-2 | |
| ITF Malaysia F1 | 10/16 01:00 | 44 | Suraj R Prabodh v Daisuke Sumizawa | 6-1,6-3 | |
| ITF Malaysia F1 | 10/15 01:00 | 44 | Daisuke Sumizawa v Francis Pare | 6-0,6-3 | |
| ITF Romania F12 | 08/27 10:30 | 62 | Alexandru Vasile Manole v Daisuke Sumizawa | 6-0,6-3 | |
| ITF Romania F11 Qual | 08/19 15:00 | 62 | Sorin Andrei Iordache v Daisuke Sumizawa | 6-0,6-1 | |
| ITF China F12 Qual | 07/09 02:00 | 62 | Daisuke Sumizawa v Huixin Wang | 1-6,1-6 | |
| ITF China F12 Qual | 07/08 05:00 | 62 | Yili Zheng v Daisuke Sumizawa | 2-6,2-6 | |
| ITF China F11 Qual | 07/03 02:15 | 62 | Runhao Hua v Daisuke Sumizawa | 6-1,4-6,6-1 | |
| ITF China F11 Qual | 07/02 09:15 | 62 | Daisuke Sumizawa v Zhao Cai | 6-2,7-6 | |
| ITF China F11 Qual | 07/01 08:45 | 62 | Daisuke Sumizawa v Leo Tang | 6-1,6-1 | |
| ITF Guam F1 | 06/19 01:15 | 25 | Connor Farren v Daisuke Sumizawa | 7-5,6-1 | |
| ITF Guam F1 | 06/17 00:00 | 54 | Daisuke Sumizawa v Joseph W. Van Meter | 4-6,6-4,6-2 | |
| ITF Japan F8 | 06/12 00:00 | 62 | Daisuke Sumizawa v Yuki Matsuo | 3-6,4-6 | |
| ITF Japan F8 | 06/11 00:00 | 62 | Masaki Osafune v Daisuke Sumizawa | Retired | |
| ITF Japan F8 | 06/10 00:00 | 62 | Daisuke Sumizawa v Takuya Komura | 6-4,6-0 | |
| ITF Japan F7 | 06/03 01:00 | 54 | Daisuke Sumizawa v Luca Castelnuovo | 3-6,3-6 | |
| ITF Japan F6 Qual | 05/29 03:00 | 54 | Yuga Tashiro v Daisuke Sumizawa | 6-1,6-1 | |
| ITF Japan F6 Qual | 05/28 06:00 | - | Yuga Tashiro v Daisuke Sumizawa | 6-1,6-1 | |
| ITF Japan F6 Qual | 05/27 01:00 | 54 | Yuichiro Inui v Daisuke Sumizawa | 2-6,3-6 | |
| ITF Japan F5 | 04/01 02:00 | 54 | Rimpei Kawakami v Daisuke Sumizawa | 7-5,6-4 | |
| ITF Japan F4 | 03/27 08:00 | 62 | Daisuke Sumizawa v Tomohiro Masabayashi | 0-6,0-6 | |
| ITF Japan F3 | 03/20 02:35 | 25 | Daisuke Sumizawa v Issei Okamura | 2-6,2-6 | |
| ITF China F3 Qual | 02/26 01:30 | 62 | Yuanfeng Li v Daisuke Sumizawa | 7-6,6-4 | |
| ITF China F3 Qual | 02/25 03:00 | 62 | Shiyou Liu v Daisuke Sumizawa | 2-6,2-6 | |
| ITF China F2 Qual | 02/20 04:20 | 62 | Ryota Tanuma v Daisuke Sumizawa | 6-4,6-2 | |
| ITF China F2 Qual | 02/19 07:30 | 62 | Daisuke Sumizawa v Weiqiang Zheng | 2-6,7-6,6-4 | |
| ITF China F2 Qual | 02/18 08:05 | 62 | Daisuke Sumizawa v Ang Ji | 6-2,7-6 | |
| ITF China F1 Qual | 02/13 05:55 | 62 | Tao Mu v Daisuke Sumizawa | 7-6,1-6,6-4 |