Victoria Azarenka of Belarus kisses her trophy after winning the women's final against China's Li Na at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 26, 2013. Azarenka won 4-6, 6-4, 6-3. Andy Wong / AP
China's Li Na (R) poses with former champion Margaret Court as she holds the runners up trophy after defeat in her women's singles final against Belarus's Victoria Azarenka on day thirteen of the Australian Open tennis tournament in Melbourne on January 26, 2013. Azarenka won 4-6, 6-4, 6-3. GREG WOOD / AFP/Getty Images
Belarus's Victoria Azarenka reacts after victory in her women's singles final against Li Na of China on day thirteen of the Australian Open tennis tournament in Melbourne on January 26, 2013. Azarenka won 4-6, 6-4, 6-3. GREG WOOD / AFP/Getty Images
Victoria Azarenka of Belarus reacts after winning her match against Li Na of China in the women'Äôs singles final of the Australian Open tennis tournament in Melbourne, Australia, 26 January 2012. Azarenka won 4-6, 6-4, 6-3. JOE CASTRO / EFE
Victoria Azarenka, right, of Belarus is congratulated by China's Li Na after winning the women's final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 26, 2013. Azarenka won 4-6, 6-4, 6-3. Andy Wong / AP
Victoria Azarenka hits a forehand during the women's final between Li Na of China and Victoria Azarenka of Belarus at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 26 January 2013. Azarenka won 4-6, 6-4, 6-3. Dennis Sabangan / EFE
Victoria Azarenka of Belarus pumps her fist during her match against Li Na of China in the women'Äôs singles final of the Australian Open tennis tournament in Melbourne, Australia, 26 January 2012. Azarenka won 4-6, 6-4, 6-3. JOE CASTRO / EFE
Li Na receives medical attention during the women's final between Li Na of China and Victoria Azarenka of Belarus at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 26 January 2013. Azarenka won 4-6, 6-4, 6-3. Dennis Sabangan / EFE
Li Na limps after she slipped during the women's final between Li Na of China and Victoria Azarenka of Belarus at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 26 January 2013. Azarenka won 4-6, 6-4, 6-3. Barbara Walton / EFE
Li Na reacts in pain as she slips for the second during the women's final between Li Na of China and Victoria Azarenka of Belarus at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 26 January 2013. Azarenka won 4-6, 6-4, 6-3. Barbara Walton / EFE
Li Na of China reacts after falling a second time during her match against Victoria Azarenka of Belarus in the women'Äôs singles final of the Australian Open tennis tournament in Melbourne, Australia, 26 January 2012. Azarenka won 4-6, 6-4, 6-3. JOE CASTRO / EFE
Victoria Azarenka of Belarus in action against Li Na of China during the women's final match at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 26 January 2013. Azarenka won 4-6, 6-4, 6-3. MARK DADSWELL / EFE
Victoria Azarenka of Belarus in action during her match against Li Na of China in the women'Äôs singles final of the Australian Open tennis tournament in Melbourne, Australia, 26 January 2012. Azarenka won 4-6, 6-4, 6-3. JOE CASTRO / EFE
Li Na hits a forehand during the women's final between Li Na of China and Victoria Azarenka of Belarus at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 26 January 2013. Azarenka won 4-6, 6-4, 6-3. Dennis Sabangan / EFE
Li Na of China reacts during her match against Victoria Azarenka of Belarus in the women'Äôs singles final of the Australian Open tennis tournament in Melbourne, Australia, 26 January 2012. Azarenka won 4-6, 6-4, 6-3. JOE CASTRO / EFE
Li Na hits a forehand during the women's final between Li Na of China and Victoria Azarenka of Belarus at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 26 January 2013. Azarenka won 4-6, 6-4, 6-3. Barbara Walton / EFE
Li Na of China in action during her match against Victoria Azarenka of Belarus in the women'Äôs singles final of the Australian Open tennis tournament in Melbourne, Australia, 26 January 2012 .Azarenka won 4-6, 6-4, 6-3. JOE CASTRO / EFE
Victoria Azarenka of Belarus in action during her match against Li Na of China in the women'Äôs singles final of the Australian Open tennis tournament in Melbourne, Australia, 26 January 2012. Azarenka won 4-6, 6-4, 6-3. JOE CASTRO / EFE