400m hurdles women

Dalilah Muhammad of the United States competes on her way to winning gold 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.

Eilidh Doyle of Great Britain reacts 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.

Dalilah Muhammad of the United States, Sara Slott Petersen of Denmark, and Ashley Spencer of the United States compete 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.

Dalilah Muhammad of the United States crosses the finish line to win 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.

Dalilah Muhammad of the United States, Sara Slott Petersen of Denmark, and Ashley Spencer of the United States compete 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.