Katja Wiersholm defeated Ganna Poznikhirenko 6-4 2-6 10-1 in the W60 Berkeley qualifying round of 32 on hard. The upset overturned the form book — Ganna Poznikhirenko came in leading the head-to-head 1–0, but Katja Wiersholm had been the form player, winning 8 of their last 10 on hard. Katja Wiersholm claimed a first win over Ganna Poznikhirenko in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-09-18 | W60 Berkeley | Q32 | hard | Ganna Poznikhirenko | 6-3 6-7(6) 6-4 |
Averages over each player's completed matches in the selected window (23 vs 49). 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