Belarus

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Serena Williams returns a shot to Victoria Azarenka, of Belarus, during the women's singles final of the 2013 U.S. Open tennis tournament, Sunday, Sept. 8, 2013, in New York. (AP Photo/David Goldman)

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Victoria Azarenka, of Belarus, returns a shot to Flavia Pennetta, of Italy, during the semifinals of the 2013 U.S. Open tennis tournament, Friday, Sept. 6, 2013, in New York. (AP Photo/Charles Krupa)

Victoria Azarenka, of Belarus, returns a shot to Ana Ivanovic, of Serbia, during the quarterfinals of the 2013 U.S. Open tennis tournament, Tuesday, Sept. 3, 2013, in New York. (AP Photo/Julio Cortez)

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Victoria Azarenka, of Belarus, returns a shot to Alize Cornet, of France, during the third round of the 2013 U.S. Open tennis tournament, Saturday, Aug. 31, 2013, in New York. (AP Photo/David Goldman)

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Russia's Maria Sharapova celebrates scoring against Victoria Azarenka of Belarus in their semifinal match at the French Open tennis tournament, at Roland Garros stadium in Paris, Thursday June 6, 2013. (AP Photo/Michel Euler)

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Victoria Azarenka of Belarus returns against Russia's Elena Vesnina in their first round match of the French Open tennis tournament, at Roland Garros stadium in Paris, Wednesday, May 29, 2013. (AP Photo/Christophe Ena)

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**FILE** Hockey player Alexander Ovechkin of the Washington Capitals cheers on Maria Kirilenko of Russia as she plays Victoria Azarenka of Belarus in the women's singles bronze medal match at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Saturday, Aug. 4, 2012. (AP Photo/Mark Humphrey)