| 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 | |
| ITF China F1 Qual | 02/12 08:15 | 62 | Daisuke Sumizawa v Yuxiao Jia | 6-1,7-5 | |
| ITF Hong Kong F1 | 01/03 03:45 | 25 | Daisuke Sumizawa v Takuto Niki | 1-6,0-6 | |
| ITF Hong Kong F1 | 01/01 03:00 | 54 | Albert Bisong Bikom v Daisuke Sumizawa | 4-6,4-6 | |
| ITF Hong Kong F1 | 12/31 03:00 | 54 | Daisuke Sumizawa v Alester Magalit | 6-4,6-2 | |
| ITF Hong Kong F5 | 12/23 23:00 | 54 | Daisuke Sumizawa v Ki Lung NG | 2-6,5-7 | |
| ITF Indonesia F6 | 12/11 05:00 | 44 | Wei-De Lin v Daisuke Sumizawa | 7-5,6-2 | |
| ITF Indonesia F6 | 12/10 05:00 | 44 | Daisuke Sumizawa v Chengze Lyu | 6-1,3-6,6-3 | |
| ITF Indonesia F5 | 12/06 05:55 | 25 | Daisuke Sumizawa v Viktor Filipenko | 3-6,3-6 | |
| ITF Indonesia F5 | 12/05 03:00 | 44 | Daisuke Sumizawa v Paramveer Singh Bajwa | 6-3,6-4 | |
| ITF Indonesia F5 | 12/04 03:30 | 44 | Maciej Smola v Daisuke Sumizawa | Walkover | |
| ITF Indonesia F4 Qual | 11/28 03:00 | 44 | Karol Drzewiecki v Daisuke Sumizawa | 7-6,5-7,6-4 |