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Rafael Nadal punches the air during his quarterfinal win against Tomas Berdych in the Australian Open. (AP)
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Berdych's fans are loving every moment during the Czech's quarterfinal match against Nadal. (Getty Images)
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Berdych reacts after having a word with the umpire during his quarterfinal match against Nadal. (Getty Images)
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Roger Federer shakes hands with Juan Martin del Potro after beating the Argentine in straight sets in the quarters. (Getty Images)
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del Potro serves during his quarterfinal match against Federer. (Getty Images)
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Defending champion Kim Clijsters celebrates after winning her quarterfinal match against top seed Caroline Wozniacki. (Getty Images)
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Wozniacki is in a reflective mood during her quarterfinal against Clijsters. (Getty Images)
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Victoria Azarenka celebrates after her quarterfinal win over Agnieszka Radwanska. (Getty Images)
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Radwanska in action during her last-8 match against Azarenka. (Getty Images)
