Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Qujing | 2019/07/11 03:20 | Rio Noguchi v Daisuke Sumizawa | 6-3,6-0 |
| ITF M25 Qujing | 2019/07/09 04:30 | Zhuoyang Qiu v Daisuke Sumizawa | 1-6,0-6 |
| ITF M25 Kunshan | 2019/07/04 03:10 | Daisuke Sumizawa v Haitong Xia | 3-6,6-4,3-6 |
| ITF M25 Kunshan | 2019/07/02 10:35 | Pol Wattanakul v Daisuke Sumizawa | 1-6,6-2,3-6 |
| ITF M15 Anseong | 2019/06/25 02:45 | Uisung Park v Daisuke Sumizawa | 6-4,3-6,6-2 |
| ITF M15 Gimcheon | 2019/06/19 01:00 | Oh-Hee Kwon v Daisuke Sumizawa | 4-6,7-6,6-3 |
| 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 M25 Iowa City | 2019/07/17 15:00 | Alec Adamson v Alejandro Gonzalez | 5-7,0-6 |
| ITF M15 Singapore | 2019/06/14 02:00 | Manish Sureshkumar v Alec Adamson | 4-6,6-3,6-1 |
| ITF M15 Singapore | 2019/06/13 03:45 | Jesse Delaney v Alec Adamson | 0-6,4-6 |
| ITF M15 Singapore | 2019/06/11 02:00 | Kunal Anand v Alec Adamson | 1-6,3-6 |
| ITF M15 Singapore | 2019/06/08 07:00 | Alec Adamson v Aidan Mchugh | 6-7,6-1,3-6 |
| ITF M15 Singapore | 2019/06/07 08:30 | Alec Adamson v Kunal Anand | 6-3,7-5 |
| ITF M15 Singapore | 2019/06/06 09:00 | Alec Adamson v David Agung Susanto | 6-3,6-1 |
| ITF M15 Singapore | 2019/06/04 02:00 | Alec Adamson v Hao Yuan Ng | 6-3,6-3 |