15th IAAF World Athletics Championships Beijing 2015 - Day Four [Getty Images]

BEIJING, CHINA - AUGUST 25: Natasha Hastings of the United States looks on before competing in the Women's 400 metres Semi Final during day four of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 25, 2015 in Beijing, China. (Photo by Alexander Hassenstein/Getty Images for IAAF)

Getty Images Sport Alexander Hassenstein