Vlada Katic defeated Ella Haavisto 7-6 6-4 in the W15 Vierumaki 1 round of 16 on hard. The upset overturned the form book — Ella Haavisto came in leading the head-to-head 1–0. Vlada Katic claimed a first win over Ella Haavisto in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-10-25 | W15 Villena 1 | R16 | hard | Ella Haavisto | 6-7(2) 6-4 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.