The second pair of quarterfinals saw defending champion Serena Williams surviving a tough contest against Victoria Azarenka, while Serena's sister Venus got upset by Li Na, the second player from China in this year's Australian Open semifinals.
The four-time Australian Open champion Serena Williams was on the brink of defeat after losing the first set and trailing 4-0 in the second. Serena's trademark comeback abilities are always by her side, especially at Grand Slams, and this time the American top seed resorted to them again to eventually beat Victoria Azarenka 4-6 7-6(4) 6-2. The 11-time Grand Slam champion has won three Grand Slam titles saving match points on the way, two of the times at the Australian Open.
In the earlier quarterfinal, Venus Williams lost to Li Na 2-6 7-6(4) 7-5, and the Chinese advanced to her first Grand Slam semifinal, joining compatriot Zheng Jie in the elite four. Venus was two points away from winning the match in the second set, but threw away a match-winning lead. Li had saved two match points in her third-round victory over Agnes Szavay and has now progressed further than ever in a major event.