Kim Clijsters defeated Victoria Azarenka 6-3 6-2 in the Sydney quarter-final on hard. The upset overturned the form book — Victoria Azarenka came in defending last year's semi-final. Kim Clijsters extended the head-to-head to 4–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-01-16 | Australian Open | SF | hard | Victoria Azarenka | 6-4 1-6 6-3 |
| 2011-03-21 | Miami | QF | hard | Victoria Azarenka | 6-3 6-3 |
| 2010-10-25 | WTA Championships | RR | hard | Kim Clijsters | 6-4 5-7 6-1 |
| 2010-06-14 | Eastbourne | QF | grass | Victoria Azarenka | 7-6(6) 6-4 |
| 2010-03-22 | Miami | R16 | hard | Kim Clijsters | 6-4 6-0 |
| 2009-08-17 | Toronto | R32 | hard | Kim Clijsters | 7-5 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 (53 vs 195). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About