Supporters of Bulgaria's Grigor Dimitrov cheer as Dimitrov play Rafael Nadal of Spain during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Andrew Brownbill)

Australian Open Tennis

Supporters of Bulgaria's Grigor Dimitrov cheer as Dimitrov play Rafael Nadal of Spain during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2014.(AP Photo/Andrew Brownbill)

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