RIO DE JANEIRO, BRAZIL - AUGUST 06: Kosuke Hagino of Japan celebrates winning gold in the Final of the Men's 400m Individual Medley on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Al Bello/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 06: Kosuke Hagino of Japan (C) is congratulated by Daiya Seto of Japan (R) after winning gold in the Final of the Men's 400m Individual Medley on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Richard Heathcote/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 06: Gold medalist Kosuke Hagino of Japan poses during the medal ceremony for the Final of the Men's 400m Individual Medley on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Rose/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 06: (L-R) Silver medalist Chase Kalisz of the United States, gold medal medalist Kosuke Hagino of Japan and bronze medalist Daiya Seto of Japan pose during the medal ceremony for the Final of the Men's 400m Individual Medley on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Rose/Getty Images)
