Ivan Lendl,  left, coach of Britain's Andy Murray,  and former Grand Slam champion Jim Courier watch Murray's practices on the Rod Laver Arena, at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014.  Wimbledon champion Murray faces Roger Federer, winner of 17 Grand Slams, at the Australian Open quarterfinal Wednesday.(AP Photo/Shuji Kajiyama)

Australian Open Tennis

Ivan Lendl, left, coach of Britain's Andy Murray, and former Grand Slam champion Jim Courier watch Murray's practices on the Rod Laver Arena, at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014. Wimbledon champion Murray faces Roger Federer, winner of 17 Grand Slams, at the Australian Open quarterfinal Wednesday.(AP Photo/Shuji Kajiyama)

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