see more

ABU DHABI, UNITED ARAB EMIRATES - DECEMBER 31: Rafeal Nadal of Spain lifts the trophy after victory against David Goffin of Belgium during the Mubadala World Tennis Championship at Zayed Sport City on December 31, 2016 in Abu Dhabi, United Arab Emirates. (Photo by Francois Nel/Getty Images)

ABU DHABI, UNITED ARAB EMIRATES - DECEMBER 31: Rafeal Nadal of Spain lifts the trophy after victory against David Goffin of Belgium during the Mubadala World Tennis Championship at Zayed Sport City on December 31, 2016 in Abu Dhabi, United Arab Emirates. (Photo by Francois Nel/Getty Images)
Getty Images

Getty Images Sport Francois Nel