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MELBOURNE, AUSTRALIA - JANUARY 27: Dani Vallverdu, coach of Tomas Berdych of the Czech Republic watches him in his quarterfinal match against Rafael Nadal of Spain during day nine of the 2015 Australian Open at Melbourne Park on January 27, 2015 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 27:  Dani Vallverdu, coach of Tomas Berdych of the Czech Republic watches him in his quarterfinal match against Rafael Nadal of Spain during day nine of the 2015 Australian Open at Melbourne Park on January 27, 2015 in Melbourne, Australia.  (Photo by Clive Brunskill/Getty Images)