RIO DE JANEIRO, BRAZIL - AUGUST 14: Kei Nishikori of Japan makes return during 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: Rafael Nadal of Spain returns a forehand during the singles bronze medal match against Kei Nishikori of Japan 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 match point to win 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 is congratualted by Rafael Nadal of Spain after winning the singles bronze 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 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)
