Stadium: Center Court Round: 44 Ground: Hardcourt outdoor
| ITF Guam F1 | 2018/06/19 04:30 | Yuichi Ito v Daisuke Sumizawa | 6-3,4-6,6-3 |
| ITF Japan F8 | 2018/06/11 00:30 | Keisuke Watanuki v Daisuke Sumizawa | 6-4,2-6,6-2 |
| ITF Japan F7 Qual | 2018/06/02 01:00 | Daisuke Sumizawa v Taisei Miyamoto | 2-6,4-6 |
| ITF Vietnam F3 | 2018/05/13 04:00 | Nicholas Bybel v Daisuke Sumizawa | 6-1,6-3 |
| ITF Vietnam F3 | 2018/05/12 03:00 | Artem Vu v Daisuke Sumizawa | 3-6,1-6 |
| ITF Vietnam F2 | 2018/05/05 05:00 | Daisuke Sumizawa v Jirat Navasirisomboon | 2-6,5-7 |
| ITF Vietnam F1 | 2018/04/29 05:30 | Jirat Navasirisomboon v Daisuke Sumizawa | 6-2,6-1 |
| ITF Vietnam F1 | 2018/04/28 05:00 | Yuttana Charoenphon v Daisuke Sumizawa | 4-6,2-6 |
| ITF China F9 Qual | 2018/06/30 02:00 | Yifeng Fu v Lewei Cai | 3-6,7-5,6-2 |
| ITF China F8 Qual | 2018/06/03 02:00 | Lewei Cai v Kento Tagashira | 1-6,2-6 |
| ITF Turkey F14 | 2018/04/07 11:00 | Lewei Cai v Alberto Cammarata | 2-6,1-6 |
| ITF Spain F7 | 2018/03/16 12:00 | Manuel Barros v Lewei Cai | 6-1,6-2 |
| ITF China F3 Qual | 2018/01/20 02:30 | Jiayi Li v Lewei Cai | 6-1,6-7,6-0 |
| ITF China F2 Qual | 2018/01/13 07:30 | Lewei Cai v Hanyi Liu | 3-6,2-6 |
| ITF China F1 Qual | 2018/01/06 04:15 | Naifu Zhang v Lewei Cai | 6-2,6-0 |
| ITF China F11 Qual | 2017/07/01 03:25 | Lewei Cai v Changwei Peng | 0-6,3-6 |