MADRID, SPAIN - MAY 14:  Dominic Thiem (C) of Australia in action against  Rafael Nadal (not seen) of Spain during the ATP Masters 1000 Open men's final tennis match within the Mutua Madrid Open at La Caja Magica in Madrid, Spain on May 14, 2017. (Photo by Burak Akbulut/Anadolu Agency/Getty Images)
MADRID, SPAIN - MAY 14: Rafael Nadal (R) of Spain and Dominic Thiem (L) of Australia salute each other during the ATP Masters 1000 Open men's final tennis match within the Mutua Madrid Open at La Caja Magica in Madrid, Spain on May 14, 2017. (Photo by Burak Akbulut/Anadolu Agency/Getty Images)
MADRID, SPAIN - MAY 14: Rafael Nadal (R) of Spain celebrates his victory with his trophy after his match against Dominic Thiem (L) of Australia during the ATP Masters 1000 Open men's final tennis match within the Mutua Madrid Open at La Caja Magica in Madrid, Spain on May 14, 2017. (Photo by Burak Akbulut/Anadolu Agency/Getty Images)