Serena Williams defeated Sara Errani 7-5 6-2 in the Madrid semi-final on clay. The result followed the form book — Serena Williams came in leading the head-to-head 8–0, defending the title. Serena Williams extended the head-to-head to 9–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-05-25 | Roland Garros | QF | clay | Serena Williams | 6-1 6-3 |
| 2015-04-18 | Fed Cup WG PO: ITA vs USA | RR | clay | Serena Williams | 4-6 7-6(3) 6-3 |
| 2014-05-12 | Rome | F | clay | Serena Williams | 6-3 6-0 |
| 2013-05-27 | Roland Garros | SF | clay | Serena Williams | 6-0 6-1 |
| 2012-08-27 | US Open | SF | hard | Serena Williams | 6-1 6-2 |
| 2009-02-16 | Dubai | R32 | hard | Serena Williams | 4-6 6-2 6-0 |
| 2009-01-12 | Sydney | R16 | hard | Serena Williams | 6-1 6-2 |
| 2008-05-12 | Rome | R16 | clay | Serena Williams | 6-4 6-3 |
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 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About