Sayaka Ishii leads 2 to 1 over 3 singles meetings since 2022. Last meeting on 24/09/2026 at W50 Nanao.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 24/09/2026 | W50 Nanao | Round 2 | carpet | Ishii | 7-5 6-7 2-5 |
| 27/04/2026 | W100 Gifu | Qualifying 1 | hard | Ishii | 7-6(5) 6-4 |
| 04/10/2022 | W25 Makinohara | Round 1 | grass | Kawaguchi | 6-1 4-6 5-7 |
| carpet | Kawaguchi 0 - 1 Ishii |
| hard | Kawaguchi 0 - 1 Ishii |
| grass | Kawaguchi 1 - 0 Ishii |
| 2026 | Kawaguchi 0 - 2 Ishii |
| 2022 | Kawaguchi 1 - 0 Ishii |
130 wins, 93 losses since 2021 (58.3%).
Last matches: V D V D D
131 wins, 92 losses since 2021 (58.7%).
Last matches: D V D V D
Sayaka Ishii leads 2 to 1 over 3 singles meetings since 2022.
On 24/09/2026, at W50 Nanao (Round 2): Sayaka Ishii won 7-5 6-7 2-5.