Roger Federer of Switzerland signs autographs for fans after defeating Andy Murray of Britain in their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Aaron Favila)
Roger Federer of Switzerland celebrates after defeating Andy Murray of Britain during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Rick Rycroft)
Roger Federer of Switzerland waves after defeating Andy Murray of Britain in their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014. (AP Photo/Aaron Favila)
Andy Murray of Britain adjusts his cap as he plays Roger Federer of Switzerland during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Andrew Brownbill)
Roger Federer of Switzerland throws a towel as he plays Andy Murray of Britain during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Rick Rycroft)
Roger Federer of Switzerland, right, is congratulated by Andy Murray of Britain at the net after Federer won their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Andrew Brownbill)