Victoria Azarenka of Belarus poses with her trophy after defeating Serena Williams of the United States in the final match at the Qatar Open tennis tournament in Doha Feb. 17, 2013. Azarenka won 2-1. (Xinhua/Chen Shaojin)

Victoria Azarenka of Belarus poses with her trophy along side Nasser al-Khelaifi, president of the Qatar Tennis Federation, after defeating Serena Williams of the U.S. in the final match at the Qatar Open tennis tournament in Doha Feb. 17, 2013. Azarenka won 2-1. (Xinhua/Chen Shaojin)

Serena Williams of the United States reacts during the final match against Victoria Azarenka of Belarus at the Qatar Open tennis tournament in Doha Feb. 17, 2013. Serena Williams lost 1-2. (Xinhua/Chen Shaojin)

Victoria Azarenka of Belarus returns a shot to Serena Williams of the United States in the final match at the Qatar Open tennis tournament in Doha Feb. 17, 2013. Azarenka won 2-1 to claim the title of the event. (Xinhua/Chen Shaojin)

Victoria Azarenka (R) of Belarus and Serena Williams of the United States pose with their trophies after the final match at the Qatar Open tennis tournament in Doha Feb. 17, 2013. Azarenka won 2-1. (Xinhua/Chen Shaojin)

Victoria Azarenka of Belarus returns a shot to Serena Williams of the United States in the final match at the Qatar Open tennis tournament in Doha Feb. 17, 2013. Azarenka won 2-1 to claim the title of the event. (Xinhua/Chen Shaojin)

Serena Williams of the United States poses with her trophy after the final match against Victoria Azarenka of Belarus at the Qatar Open tennis tournament in Doha Feb. 17, 2013. Serena Williams lost 1-2. (Xinhua/Chen Shaojin)

Victoria Azarenka of Belarus kisses her trophy after defeating Serena Williams of the United States in the final match at the Qatar Open tennis tournament in Doha Feb. 17, 2013. Azarenka won 2-1. (Xinhua/Chen Shaojin)