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RIO DE JANEIRO, BRAZIL - AUGUST 14: Kei Nishikori of Japan celebrates after winning the singles bronze medal match against Rafael Nadal of Spain 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 Julian Finney/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 14:  Kei Nishikori of Japan celebrates after winning the singles bronze medal match against Rafael Nadal of Spain 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 Julian Finney/Getty Images)