MELBOURNE, AUSTRALIA - JANUARY 18: Rafael Nadal of Spain hits a forehand during a practice session ahead of the 2015 Australian Open at Melbourne Park on January 18, 2015 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 18: Rafael Nadal of Spain hits a forehand during a practice session ahead of the 2015 Australian Open at Melbourne Park on January 18, 2015 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)