Bethanie Mattek Sands defeated Flavia Pennetta 6-4 2-6 7-5 in the Los Angeles round of 32 on hard. The upset overturned the form book — Flavia Pennetta came in leading the head-to-head 4–1, defending last year's round of 64. Bethanie Mattek Sands narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-09 | Rome | R64 | clay | Bethanie Mattek Sands | 6-4 4-6 6-3 |
| 2008-07-21 | Los Angeles | SF | hard | Flavia Pennetta | 3-6 6-2 7-5 |
| 2006-05-29 | Roland Garros | R128 | clay | Flavia Pennetta | 6-3 6-1 |
| 2006-02-20 | Bogota | QF | clay | Flavia Pennetta | 6-3 6-1 |
| 2003-03-05 | Indian Wells | R128 | hard | Flavia Pennetta | 6-0 4-6 6-1 |
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 (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About