Switzerland's Roger Federer reacts after winning the second set of his men's semifinal against Britain's Andy Murray at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Andy Wong)

Associated Press
Switzerland's Roger Federer reacts after winning the second set of his men's semifinal against Britain's Andy Murray at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Andy Wong)
Switzerland's Roger Federer reacts after winning the second set of his men's semifinal against Britain's Andy Murray at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Andy Wong)
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