Milos Raonic of Canada walks off the court after his third round loss to Grigor Dimitrov of Bulgaria at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 18, 2014.(AP Photo/Andrew Brownbill)

Australian Open Tennis

Milos Raonic of Canada walks off the court after his third round loss to Grigor Dimitrov of Bulgaria at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 18, 2014.(AP Photo/Andrew Brownbill)

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