Serena Williams defeated Flavia Pennetta 6-3 6-2 in the US Open quarter-final on hard. The result followed the form book — Serena Williams came in leading the head-to-head 6–0, defending the title. Serena Williams extended the head-to-head to 7–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-10 | Toronto | R32 | hard | Serena Williams | 2-6 6-3 6-0 |
| 2014-08-11 | Cincinnati | R16 | hard | Serena Williams | 6-2 6-2 |
| 2013-03-18 | Miami | R64 | hard | Serena Williams | 6-1 6-1 |
| 2012-05-14 | Rome | QF | clay | Serena Williams | 4-0 RET |
| 2009-08-31 | US Open | QF | hard | Serena Williams | 6-4 6-3 |
| 2008-03-24 | Miami | R32 | hard | Serena Williams | 6-7(6) 6-3 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 78). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About