Serena Williams defeated Conchita Martinez 6-2 4-6 6-2 in the Los Angeles quarter-final on hard. The result followed the form book — Serena Williams came in leading the head-to-head 4–0. Serena Williams extended the head-to-head to 5–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-05-12 | Rome | QF | clay | Serena Williams | 7-5 6-2 |
| 2003-04-07 | Charleston | R16 | clay | Serena Williams | 6-2 6-2 |
| 1999-08-30 | US Open | R16 | hard | Serena Williams | 4-6 6-2 6-2 |
| 1998-05-04 | Rome | R16 | clay | Serena Williams | 6-2 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 18). ATP, WTA & Challenger.