/https%3A%2F%2Fsportsmole-media-prod.s3.gra.io.cloud.ovh.net%2F11%2F31%2Fpetrakvitova_20110702.jpg "Result: Kvitova defeats Wozniacki")
Petra Kvitova has made it through to the semi-finals of the WTA Championships with a straight-sets victory over Caroline Wozniacki.
After a tired performance lost her the first set 6-4, the world number one needed her blood pressure checked courtside but was given the all-clear to continue.
However, Azarenka capitalised on her opponent's ailing fitness and took the second 6-2.
The Wimbledon champion will be joined by Victoria Azarenka in the final four after her win against Li Na.
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