Patricia Wartusch defeated Els Callens 6-1 6-4 in the Knokke-Heist round of 16 on clay. The upset overturned the form book — Els Callens came in leading the head-to-head 1–0. Patricia Wartusch claimed a first win over Els Callens in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-18 | Southampton 50K | F | carpet | Els Callens | 6-3 6-3 |
Averages over each player's completed matches in the selected window (2 vs 10). 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