Stadium: Court 19 Round: 25 Ground: Hardcourt outdoor
| ITF Korea F6 | 2018/08/28 02:00 | Oh-Hee Kwon v Daisuke Sumizawa | 6-1,6-4 |
| ITF M15 Gimcheon | 2019/06/18 02:40 | Oh-Hee Kwon v Joseph W. Van Meter | 6-2,6-3 |
| ITF M15 Gimcheon | 2019/06/17 03:45 | Oh-Hee Kwon v Woo Young Lee | 6-0,6-1 |
| ITF M15 Akishima | 2019/06/12 01:00 | Oh-Hee Kwon v Hiroyasu Ehara | 1-6,3-6 |
| ITF M15 Akishima | 2019/06/11 03:10 | Oh-Hee Kwon v Taiyo Hirano | 6-2,6-2 |
| ITF M15 Daegu | 2019/06/06 02:00 | Cheong-Eui Kim v Oh-Hee Kwon | 4-6,6-3,6-0 |
| ITF M15 Daegu | 2019/06/05 01:00 | Ken Onishi v Oh-Hee Kwon | 2-6,2-6 |
| ITF Korea F6 | 2018/08/30 03:00 | Oh-Hee Kwon v Seong-Gook Oh | 4-6,1-6 |
| ITF Korea F6 | 2018/08/28 02:00 | Oh-Hee Kwon v Daisuke Sumizawa | 6-1,6-4 |
| 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 Wuhan | 2019/05/09 03:10 | Yan Bai v Daisuke Sumizawa | 6-3,6-1 |
| ITF M25 Wuhan | 2019/05/08 03:30 | Ray Ho v Daisuke Sumizawa | 6-7,3-6 |
| ITF M25 Wuhan | 2019/05/07 02:00 | Weiqiang Zheng v Daisuke Sumizawa | 6-2,6-7,7-10 |