RIO DE JANEIRO, BRAZIL - AUGUST 18: Dalilah Muhammad of the United States, gold, Sara Slott Petersen of Denmark, silver and Ashley Spencer of the United States, bronze, cross the finishline in the Women's 400m Hurdles Final on Day 13 of the Rio 2016 Olympic Games at the Olympic Stadium on August 18, 2016 in Rio de Janeiro, Brazil. (Photo by Ezra Shaw/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 18: Sara Slott Petersen of Denmark celebrates winning silver in the Women's 400m Hurdles Final on Day 13 of the Rio 2016 Olympic Games at the Olympic Stadium on August 18, 2016 in Rio de Janeiro, Brazil. (Photo by Paul Gilham/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 18: Sara Slott Petersen of Denmark celebrates winning silver in the Women's 400m Hurdles Final on Day 13 of the Rio 2016 Olympic Games at the Olympic Stadium on August 18, 2016 in Rio de Janeiro, Brazil. (Photo by Ezra Shaw/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 18: Sara Slott Petersen of Denmark, silver, celebrates after the Women's 400m Hurdles Final on Day 13 of the Rio 2016 Olympic Games at the Olympic Stadium on August 18, 2016 in Rio de Janeiro, Brazil. (Photo by Alexander Hassenstein/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 18: Dalilah Muhammad of the United States, gold, Sara Slott Petersen of Denmark, silver and Ashley Spencer of the United States, bronze, celebrate after the Women's 400m Hurdles Final on Day 13 of the Rio 2016 Olympic Games at the Olympic Stadium on August 18, 2016 in Rio de Janeiro, Brazil. (Photo by Alexander Hassenstein/Getty Images)
