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RIO DE JANEIRO, BRAZIL - AUGUST 20: Caster Semenya of South Africa is introduced to the crowd before the Women's 800m Final on Day 15 of the Rio 2016 Olympic Games at the Olympic Stadium on August 20, 2016 in Rio de Janeiro, Brazil. (Photo by Bob Thomas/Popperfoto via Getty Images/Getty Images).

RIO DE JANEIRO, BRAZIL - AUGUST 20: Caster Semenya of South Africa is introduced to the crowd before the Women's 800m Final on Day 15 of the Rio 2016 Olympic Games at the Olympic Stadium on August 20, 2016 in Rio de Janeiro, Brazil. (Photo by Bob Thomas/Popperfoto via Getty Images/Getty Images).