Barbara Schwartz defeated Els Callens 4-6 7-6 6-2 in the Knokke-Heist round of 32 on clay. The upset overturned the form book — Els Callens came in leading the head-to-head 2–0, defending last year's round of 16. Barbara Schwartz claimed a first win over Els Callens in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-06-24 | Wimbledon | R128 | grass | Els Callens | 3-6 6-4 6-2 |
| 1999-09-20 | Luxembourg | R16 | hard | Els Callens | 7-6 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About
Averages over each player's completed matches in the selected window (1 vs 10). ATP, WTA & Challenger.