Sayaka Ishii leads 2 to 1 over 3 singles meetings since 2024. Last meeting on 23/04/2026 at W35 Miyazaki.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 23/04/2026 | W35 Miyazaki | Round 2 | hard | Chang | 5-7 2-6 |
| 07/07/2025 | Hall of Fame Open - Newport | Round 1 | grass | Ishii | 1-6 6-4 5-7 |
| 04/09/2024 | W100 Incheon | Round 1 | hard | Ishii | 6-3 1-6 1-6 |
| hard | Chang 1 - 1 Ishii |
| grass | Chang 0 - 1 Ishii |
| 2026 | Chang 1 - 0 Ishii |
| 2025 | Chang 0 - 1 Ishii |
| 2024 | Chang 0 - 1 Ishii |
185 wins, 142 losses since 2021 (56.6%).
Last matches: D V D V V
122 wins, 88 losses since 2021 (58.1%).
Last matches: D D V D V
Sayaka Ishii leads 2 to 1 over 3 singles meetings since 2024.
On 23/04/2026, at W35 Miyazaki (Round 2): Hanna Chang won 5-7 2-6.