Yukina Saigo defeated Ayumi Koshiishi 6-4 6-1 in the W25 Tokyo round of 32 on hard. The upset overturned the form book — Ayumi Koshiishi came in leading the head-to-head 1–0. Yukina Saigo claimed a first win over Ayumi Koshiishi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2022-11-14 | W60 Tokyo | Q32 | hard | Ayumi Koshiishi | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.