Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Nonthaburi | 2020/02/02 03:40 | Yuki Mochizuki v Keisuke Saitoh | 6-3,6-0 |
| ITF M25 Nonthaburi | 2020/01/27 04:25 | Ben Patael v Keisuke Saitoh | 6-3,6-2 |
| ITF M25 Nonthaburi | 2020/01/26 03:55 | Thanapet Chanta v Keisuke Saitoh | 4-6,6-2,8-10 |
| ITF M15 Nonthaburi | 2019/12/03 05:30 | Keisuke Saitoh v Makoto Ochi | 2-6,2-6 |
| ITF M15 Nonthaburi | 2019/11/29 03:00 | Duckhee Lee v Keisuke Saitoh | 6-2,6-1 |
| ITF M15 Nonthaburi | 2019/11/28 02:30 | Keisuke Saitoh v Rio Noguchi | 7-5,7-6 |
| ITF M15 Nonthaburi | 2019/11/27 02:30 | Keisuke Saitoh v Ryota Tanuma | 6-2,7-6 |
| ITF M15 Akishima | 2019/06/14 03:15 | Rio Noguchi v Keisuke Saitoh | 6-1,6-1 |