Serena Williams defeated Dinara Safina 6-4 6-1 in the WTA Tour Championships round robin on carpet. The result followed the form book — Serena Williams came in leading the head-to-head 5–1, defending last year's round-robin. Serena Williams extended the head-to-head to 6–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-01-19 | Australian Open | F | hard | Serena Williams | 6-0 6-3 |
| 2008-08-25 | US Open | SF | hard | Serena Williams | 6-3 6-2 |
| 2008-05-05 | Berlin | QF | grass | Dinara Safina | 2-6 6-1 7-6(5) |
| 2007-05-28 | Roland Garros | R16 | clay | Serena Williams | 6-2 6-3 |
| 2004-09-20 | Beijing | R16 | hard | Serena Williams | 6-4 3-6 6-3 |
| 2002-08-26 | US Open | R64 | hard | Serena Williams | 6-0 6-1 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.