Tomas Berdych of the Czech Republic makes a backhand return to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 22, 2013. (AP Photo/Rob Griffith)

Associated Press
Tomas Berdych of the Czech Republic makes a backhand return to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 22, 2013. (AP Photo/Rob Griffith)
Tomas Berdych of the Czech Republic makes a backhand return to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 22, 2013. (AP Photo/Rob Griffith)
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