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DOHA, QATAR - JANUARY 5: Nicolas Almagro of Spain returns the ball to Andy Murray (not seen) during the men's singles quarter final match of the 2017 Qatar ExxonMobil Open Tennis Tournament at Khalifa International Tennis and Squash Complex in Doha, Qatar on January 5, 2017. (Photo by Mohammed Dabbous/Anadolu Agency/Getty Images)

DOHA, QATAR - JANUARY 5:   Nicolas Almagro of Spain returns the ball to Andy Murray (not seen) during the men's singles quarter final match of the 2017 Qatar ExxonMobil Open Tennis Tournament at Khalifa International Tennis and Squash Complex in Doha, Qatar on January 5, 2017. (Photo by Mohammed Dabbous/Anadolu Agency/Getty Images)