Keisuke Saitoh leads 2 to 1 over 3 singles meetings since 2024. Last meeting on 09/09/2026 at M25 Sapporo.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 09/09/2026 | M25 Sapporo | Round 1 | hard | Saitoh | 6-4 5-1 |
| 06/09/2024 | M25 Sapporo | Quarter-final | hard | Isomura | 6-2 6-4 |
| 01/08/2024 | M25 Taipei | Round 2 | hard | Saitoh | 3-6 4-6 |
| hard | Saitoh 2 - 1 Isomura |
| 2026 | Saitoh 1 - 0 Isomura |
| 2024 | Saitoh 1 - 1 Isomura |
168 wins, 130 losses since 2021 (56.4%).
Last matches: V V V V V
150 wins, 132 losses since 2021 (53.2%).
Last matches: D D V D D
Keisuke Saitoh leads 2 to 1 over 3 singles meetings since 2024.
On 09/09/2026, at M25 Sapporo (Round 1): Keisuke Saitoh won 6-4 5-1.