Serena Williams defeated Els Callens 6-4 6-4 in the Wimbledon round of 64 on grass. The result followed the form book — Serena Williams came in leading the head-to-head 2–0, defending the title. Serena Williams extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-01-13 | Australian Open | R64 | hard | Serena Williams | 6-4 6-0 |
| 2002-06-24 | Wimbledon | R32 | grass | Serena Williams | 7-6(5) 7-6(2) |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (199 vs 9). ATP, WTA & Challenger.