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MELBOURNE, AUSTRALIA - JANUARY 23: Grigor Dimitrov of Bulgaria celebrates winning his third round match against Marcos Baghdatis of Cyprus during day five of the 2015 Australian Open at Melbourne Park on January 23, 2015 in Melbourne, Australia. (Photo by Robert Prezioso/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 23:  Grigor Dimitrov of Bulgaria celebrates winning his third round match against Marcos Baghdatis of Cyprus during day five of the 2015 Australian Open at Melbourne Park on January 23, 2015 in Melbourne, Australia.  (Photo by Robert Prezioso/Getty Images)