ITF - M15 Tsukuba 03/28 06:30 26 Daisuke Sumizawa v Stefanos Sakellaridis 3-6,6-3,1-6
ITF - M15 Tsukuba 03/27 04:15 25 Ryotaro Shimomura v Daisuke Sumizawa 6-4,3-6,4-6
ITF - M15 Tsukuba 03/25 06:00 54 Daisuke Sumizawa v Masamichi Imamura 6-3,6-4
ITF - M15 Tsukuba 03/24 01:00 54 Daisuke Sumizawa v Linghao Zhang 7-5,6-1
ITF - M15 Hinode 03/13 05:40 25 Hikaru Shiraishi v Daisuke Sumizawa 6-1,7-6
UTR Pro - Kawaguchi 03/02 03:00 - Ryotaro Matsumura v Daisuke Sumizawa 6-2,7-5
ITF - M15 Yanagawa 12/20 07:45 25 Daisuke Sumizawa v Koki Matsuda 5-7,3-6
ITF - M25 Gold Coast 11/29 01:55 25 Daisuke Sumizawa v Matthew Dellavedova 6-7,4-6
ITF - M25 Brisbane 11/22 03:50 25 Daisuke Sumizawa v Emile Hudd 2-6,2-6
ITF - M25 Cairns 10/12 00:00 26 Omar Jasika v Daisuke Sumizawa 6-1,6-2
ITF - M25 Cairns 10/10 23:50 25 Daisuke Sumizawa v Taiyo Yamanaka 6-2,6-2
ITF - M25 Cairns 10/06 02:25 27 Daisuke Sumizawa v Ajeet Rai 6-4,5-7,2-6
ITF - M25 Cairns 10/05 02:45 26 Daisuke Sumizawa v Kody Pearson 6-2,1-6,6-4
ITF - M25 Cairns 10/04 03:15 25 Daisuke Sumizawa v Corban Crowther 7-6,4-6,6-1
ITF - M25 Takasaki 09/21 03:15 26 Naoki Nakagawa v Daisuke Sumizawa 7-5,6-4
ITF - M25 Takasaki 09/19 01:00 25 Takuya Kumasaka v Daisuke Sumizawa Retired
ITF - M25 Sapporo 09/15 00:55 26 Koki Matsuda v Daisuke Sumizawa 6-0,7-6
ITF - M25 Sapporo 09/13 01:00 25 Daisuke Sumizawa v Yunseok Jang 6-3,6-4
ITF - M25 Sapporo 09/10 02:00 29 Shuichi Sekiguchi v Daisuke Sumizawa 6-1,6-4
ITF - M25 Sapporo 09/09 01:55 28 Sora Fukuda v Daisuke Sumizawa 4-6,4-6
ITF - M25 Sapporo 09/08 04:45 27 Daisuke Sumizawa v Ko Suzuki 7-5,6-2
ITF - M25 Sapporo 09/07 01:00 26 Tomohiro Masabayashi v Daisuke Sumizawa 3-6,3-6
ITF - M25 Hong Kong 08/30 04:10 25 Egor Gerasimov v Daisuke Sumizawa 4-6,6-3,7-5
ITF - M25 Hong Kong 08/28 02:00 54 Daisuke Sumizawa v David Agung Susanto 6-2,6-2
ITF - M25 Hong Kong 08/27 02:30 54 Daisuke Sumizawa v Pengyu Lu 3-6,6-1,10-5
ITF - M15 Caloundra 08/04 04:20 27 Daisuke Sumizawa v Luke Saville 4-6,4-6
ITF - M15 Caloundra 08/03 00:00 26 Daisuke Sumizawa v Jeremy Zhang 6-2,6-1
ITF - M15 Caloundra 08/01 04:45 25 Daisuke Sumizawa v Taiyo Yamanaka 4-6,6-3,7-6
ITF - M15 Caloundra 07/28 01:00 27 Daisuke Sumizawa v Thomas Fancutt 6-3,6-7,3-6
ITF - M15 Caloundra 07/27 04:40 26 Daisuke Sumizawa v Luke Sorensen 6-4,6-3