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RIO DE JANEIRO, BRAZIL - AUGUST 14: Juan Martin Del Potro of Argentina rests on the net while playing against Andy Murray of Great Britain during the Men's Singles Gold Medal Match 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 Bob Thomas/Popperfoto via Getty Images/Getty Images).

RIO DE JANEIRO, BRAZIL - AUGUST 14: Juan Martin Del Potro of Argentina rests on the net while playing against Andy Murray of Great Britain during the Men's Singles Gold Medal Match 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 Bob Thomas/Popperfoto via Getty Images/Getty Images).