USA's Michael Phelps competes in the Men's 200m Butterfly Semifinal during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. / AFP / François-Xavier MARIT (Photo credit should read FRANCOIS-XAVIER MARIT/AFP/Getty Images)
TOPSHOT - USA's Michael Phelps competes in the Men's 200m Butterfly Semifinal during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. / AFP / François-Xavier MARIT (Photo credit should read FRANCOIS-XAVIER MARIT/AFP/Getty Images)
TOPSHOT - USA's Michael Phelps competes in the Men's 200m Butterfly Semifinal during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. (Photo by CHRISTOPHE SIMON / AFP) (Photo credit should read CHRISTOPHE SIMON/AFP/Getty Images)
South Africa's Chad Guy Bertrand Le Clos competes in a Men's 200m Butterfly heat during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. / AFP / François-Xavier MARIT (Photo credit should read FRANCOIS-XAVIER MARIT/AFP/Getty Images)
