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RIO DE JANEIRO, BRAZIL - AUGUST 11: Michael Phelps of the United States competes in the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil. (Photo by Mike Ehrmann/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 11:  Michael Phelps of the United States competes in the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil.  (Photo by Mike Ehrmann/Getty Images)

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RIO DE JANEIRO, BRAZIL - AUGUST 11: Michael Phelps of the United States competes in the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil. (Photo by Al Bello/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 11:  Michael Phelps of the United States competes in the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil.  (Photo by Al Bello/Getty Images)

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RIO DE JANEIRO, BRAZIL - AUGUST 11: Michael Phelps of the United States competes in the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Rose/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 11:  Michael Phelps of the United States competes in the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil.  (Photo by Clive Rose/Getty Images)

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RIO DE JANEIRO, BRAZIL - AUGUST 11: Michael Phelps of the United States competes in the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil. (Photo by Christian Petersen/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 11:  Michael Phelps of the United States competes in the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil.  (Photo by Christian Petersen/Getty Images)

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RIO DE JANEIRO, BRAZIL - AUGUST 10: Michael Phelps of the USA competes in the Men's 200m Individual Medley Heats on Day 5 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 10, 2016 in Rio de Janerio, Brazil. (Photo by Vaughn Ridley/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 10:  Michael Phelps of the USA competes in the Men's 200m Individual Medley Heats on Day 5 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 10, 2016 in Rio de Janerio, Brazil.  (Photo by Vaughn Ridley/Getty Images)