RIO DE JANEIRO, BRAZIL - AUGUST 06:  (L-R) Chase Kalisz of the United States and Kosuke Hagino of Japan compete 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)