ACAPULCO, MEXICO - FEBRUARY 24: Sam Querrey of USA returns a ball during a singles match between Sam Querrey of USA and Kei Nishikori of Japan as part of Telcel ATP Mexican Open 2016 at Mextenis Stadium on February 24, 2016 in Acapulco, Mexico. (Photo by Hector Vivas/LatinContent via Getty Images)
