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RIO DE JANEIRO, BRAZIL - AUGUST 12: Michael Phelps of United States celebrate his silver medal with gold medal Joseph Schooling of Singapour the final men's 100m Butterfly at Olympic Aquatics Stadium on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Xavier Laine/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 12: Michael Phelps of United States celebrate his silver medal with gold medal Joseph Schooling of Singapour the final men's 100m Butterfly at Olympic Aquatics Stadium on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Xavier Laine/Getty Images)
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Getty Images Sport Xavier Laine