RIO DE JANEIRO, BRAZIL - AUGUST 09: Michael Phelps of United States celebrates his gold medal after the final men's 100m freestyle at Olympic Aquatics Stadium on August 9, 2016 in Rio de Janeiro, Brazil. (Photo by Xavier Laine/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 09: Michael Phelps of United States celebrates his gold medal after the final men's 100m freestyle at Olympic Aquatics Stadium on August 9, 2016 in Rio de Janeiro, Brazil. (Photo by Xavier Laine/Getty Images)