Dinara Safina defeated Roberta Vinci 7-5 6-4 in the Cincinnati round of 64 on hard. The result followed the form book — Dinara Safina came in leading the head-to-head 4–0, defending last year's final. Dinara Safina extended the head-to-head to 5–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-10-05 | Beijing | R64 | hard | Dinara Safina | 6-4 6-4 |
| 2009-08-10 | Cincinnati | R32 | hard | Dinara Safina | 2-6 7-5 6-4 |
| 2008-08-25 | US Open | R64 | hard | Dinara Safina | 6-4 6-3 |
| 2005-09-26 | Luxembourg | QF | hard | Dinara Safina | 5-7 6-3 6-4 |
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 (44 vs 200). ATP, WTA & Challenger.