Ayumi Koshiishi defeated Honoka Kobayashi 7-5 1-6 6-2 in the W50 Yokohama 1 qualifying round of 32 on hard. Ayumi Koshiishi extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-11-18 | W100 Takasaki 1 | Q32 | hard | Honoka Kobayashi | 7-6(8) 6-4 |
| 2019-06-19 | W15 Gimcheon 2 | R32 | hard | Ayumi Koshiishi | 4-6 6-4 6-4 |
Averages over each player's completed matches in the selected window (154 vs 116). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About