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ABU DHABI, UNITED ARAB EMIRATES - DECEMBER 28: Andy Murray of Great Britain and Rafeal Nadal of Spain pose for a picture during the offical players launch of 2016 Mubadala Tennis Championship at Al Maryah Island on December 28, 2016 in Abu Dhabi, United Arab Emirates. (Photo by Francois Nel/Getty Images)

ABU DHABI, UNITED ARAB EMIRATES - DECEMBER 28: Andy Murray of Great Britain and Rafeal Nadal of Spain pose for a picture during the offical players launch of 2016 Mubadala Tennis Championship at Al Maryah Island on December 28, 2016 in Abu Dhabi, United Arab Emirates. (Photo by Francois Nel/Getty Images)
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Getty Images Sport Francois Nel