Belarus

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Agnieszka Radwanska of Poland, left, shakes hands with Victoria Azarenka of Belarus at the net after Radwanska won their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Rick Rycroft)

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Victoria Azarenka of Belarus speaks during a press conference after her quarterfinal loss to Agnieszka Radwanska of Poland at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014. (AP Photo/Shuji Kajiyama)

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Victoria Azarenka of Belarus bites a towel during a break in her quarterfinal against Agnieszka Radwanska of Poland at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Andrew Brownbill)

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Agnieszka Radwanska of Poland, left, shakes hands with Victoria Azarenka of Belarus at the net after Radwanska won their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014. (AP Photo/Aaron Favila)

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Victoria Azarenka of Belarus sits in a chair during a break in her quarterfinal against Agnieszka Radwanska of Poland at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Eugene Hoshiko)

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Victoria Azarenka of Belarus walks off the court after her quarterfinal loss to Agnieszka Radwanska of Poland at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Rick Rycroft)

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Victoria Azarenka of Belarus speaks during a press conference after her quarterfinal loss to Agnieszka Radwanska of Poland at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014. (AP Photo/Shuji Kajiyama)

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Agnieszka Radwanska of Poland celebrates after defeating Victoria Azarenka of Belarus during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Aaron Favila)

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Agnieszka Radwanska of Poland celebrates after defeating Victoria Azarenka of Belarus during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Andrew Brownbill)