Patcharin Cheapchadej defeated Ayumi Koshiishi 6-1 6-3 in the W15 Hua Hin 3 round of 16 on hard. The upset overturned the form book — Ayumi Koshiishi came in leading the head-to-head 1–0, but Patcharin Cheapchadej had been the form player, winning 7 of their last 10 on hard. Patcharin Cheapchadej claimed a first win over Ayumi Koshiishi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-10-21 | W15 Hua Hin 2 | SF | hard | Ayumi Koshiishi | 6-3 1-6 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.