Keisuke Saitoh leads 4 to 1 over 5 singles meetings since 2021. Last meeting on 10/09/2024 at M25 Sapporo.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 10/09/2024 | M25 Sapporo | Round 1 | hard | Saitoh | 6-1 6-2 |
| 14/05/2024 | M15 Kursumlijska Banja | Round 1 | clay | Saitoh | 6-4 5-7 6-3 |
| 04/04/2024 | M15 Kashiwa | Round 2 | hard | Saitoh | 7-5 6-2 |
| 30/08/2022 | M25 Sapporo | Round 1 | hard | Sumizawa | 7-5 3-6 6-4 |
| 16/02/2021 | M15 Sharm El Sheikh | Qualifiers | hard | Saitoh | 6-2 6-4 |
| hard | Sumizawa 1 - 3 Saitoh |
| clay | Sumizawa 0 - 1 Saitoh |
| 2024 | Sumizawa 0 - 3 Saitoh |
| 2022 | Sumizawa 1 - 0 Saitoh |
| 2021 | Sumizawa 0 - 1 Saitoh |
138 wins, 121 losses since 2021 (53.3%).
Last matches: D D V V V
175 wins, 133 losses since 2021 (56.8%).
Last matches: D V D V V
Keisuke Saitoh leads 4 to 1 over 5 singles meetings since 2021.
On 10/09/2024, at M25 Sapporo (Round 1): Keisuke Saitoh won 6-1 6-2.