Stadium: Court 6 Round: 62 Ground: Clay
| ITF Japan F5 | 2018/03/31 00:30 | Kikuchi, Gengo v Daisuke Sumizawa | 6-1,6-3 |
| ITF Turkey F11 | 2018/03/18 07:00 | Fornell-Mestres, Marc v Daisuke Sumizawa | 6-4,6-4 |
| ITF Turkey F11 | 2018/03/17 08:30 | Bothwell, Samuel v Daisuke Sumizawa | 0-6,4-6 |
| Turkey F10, Singles Qualifying | 2018/03/10 08:30 | Gabriel Donev v Daisuke Sumizawa | 6-3,6-3 |
| ITF Turkey F9 | 2018/03/04 08:30 | Daisuke Sumizawa v Krivokuca, Neven | 1-6,2-6 |
| ITF Turkey F9 | 2018/03/03 07:00 | Daisuke Sumizawa v Sincharoenwattana, Nutdanai | 6-1,7-6 |
| Turkey F8, Singles Qualifying | 2018/02/25 07:30 | Apostol, Bogdan Ionut v Daisuke Sumizawa | 7-6,6-7,6-0 |
| Turkey F8, Singles Qualifying | 2018/02/24 07:00 | Daisuke Sumizawa v Vicente O Moratalla | 6-7,7-5,6-2 |
| ITF Japan F3 | 2018/03/17 00:30 | Watanuki, Keisuke v Numajiri, Keisuke | 3-6,1-6 |
| ITF Japan F1 | 2018/03/04 03:00 | Numajiri, Keisuke v Sasai, Masaki | 1-6,6-3,0-6 |
| Turkey F8, Singles Qualifying | 2018/02/24 09:30 | Numajiri, Keisuke v Davydov, Ivan | 1-6,7-6,5-7 |
| ITF Turkey F7 | 2018/02/17 06:30 | Bogdan Bobrov v Numajiri, Keisuke | 6-3,6-2 |
| ITF Vietnam F3 | 2017/11/21 06:10 | Katayama, Sho v Numajiri, Keisuke | 6-4,6-4 |
| ITF Vietnam F3 | 2017/11/20 04:00 | Lawrence Bataljin v Numajiri, Keisuke | 6-4,2-6,6-3 |
| ITF Vietnam F2 | 2017/11/12 04:00 | Jakub Paul v Numajiri, Keisuke | 6-7,6-4,6-1 |
| ITF Malaysia F3 | 2017/10/29 00:00 | Ito, Yuichi v Numajiri, Keisuke | 6-4,6-2 |