ACAPULCO, MEXICO - FEBRUARY 02: Juan Martin del Potro of Argentina returns a shot during a semifinal match between Juan Martin del Potro of Argentina and Alexander Zverev of Germany as part of the Telcel ATP Mexican Open 2018 at Mextenis Stadium on February 02, 2018 in Acapulco, Mexico. (Photo by Hector Vivas/Getty Images )
