RIO DE JANEIRO, BRAZIL - AUGUST 14:  (L-R) Silver medalist Juan Martin Del Potro of Argentina, gold medalist Andy Murray of Great Britain and bronze medalist Kei Nishikori of Japan pose during the medal ceremony for the men's singles on Day 9 of the Rio 2016 Olympic Games at the Olympic Tennis Centre on August 14, 2016 in Rio de Janeiro, Brazil.  (Photo by Clive Brunskill/Getty Images)