Maria Sharapova defeated Nadia Petrova 6-1 4-6 6-4 in the US Open round of 16 on hard. The result followed the form book — Maria Sharapova came in leading the head-to-head 8–1, defending last year's round of 32. Maria Sharapova extended the head-to-head to 9–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-17 | Toronto | R64 | hard | Maria Sharapova | 6-3 6-4 |
| 2009-07-27 | Stanford | R16 | hard | Maria Sharapova | 6-1 6-2 |
| 2009-05-25 | Roland Garros | R64 | clay | Maria Sharapova | 6-2 1-6 8-6 |
| 2006-10-23 | Linz | F | hard | Maria Sharapova | 7-5 6-2 |
| 2006-01-16 | Australian Open | QF | hard | Maria Sharapova | 7-6(6) 6-4 |
| 2005-11-07 | WTA Tour Championships | RR | carpet | Nadia Petrova | 6-1 6-2 |
| 2005-08-29 | US Open | QF | hard | Maria Sharapova | 7-5 4-6 6-4 |
| 2005-06-20 | Wimbledon | QF | grass | Maria Sharapova | 7-6(6) 6-3 |
| 2003-08-04 | Los Angeles | R32 | hard | Maria Sharapova | 6-2 2-6 7-5 |
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 (198 vs 79). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About