Round: 62 Ground: Clay
| ITF Japan F3 | 2018/03/17 00:30 | Keisuke Watanuki v Keisuke Numajiri | 3-6,1-6 |
| Challenger Kyoto Qual | 2018/02/17 01:00 | Keisuke Watanuki v Kosuke Shibano | 4-6,4-6 |
| ITF Japan F8 | 2017/06/15 02:30 | Keisuke Watanuki v Hiroyasu Ehara | 1-6,3-6 |
| ITF Japan F8 | 2017/06/14 05:50 | Ryota Kishi v Keisuke Watanuki | 0-6,1-6 |
| ITF Japan F8 | 2017/06/12 00:00 | Keisuke Watanuki v Kazuki Nishiwaki | 6-2,6-2 |
| ITF Japan F8 | 2017/06/10 04:00 | Keisuke Watanuki v Taketo Takamisawa | 4-6,6-2,6-3 |
| ITF Japan F7 | 2017/06/08 01:30 | Keisuke Watanuki v Kento Takeuchi | 3-6,5-7 |
| ITF Japan F6 Qual | 2017/05/29 01:00 | Keisuke Watanuki v Yuto Sakai | 6-7,6-7 |
| 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 Japan F6 Qual | 2018/04/08 04:00 | Aoran Wang v Daisuke Sumizawa | 6-2,6-2 |
| ITF Japan F5 | 2018/03/31 00:30 | Gengo Kikuchi v Daisuke Sumizawa | 6-1,6-3 |