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

BEIJING, CHINA - AUGUST 27: Nicole Tully of the United States competes in the Women's 5000 metres heats during day six of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 27, 2015 in Beijing, China. (Photo by Alexander Hassenstein/Getty Images for IAAF)

Getty Images Sport Alexander Hassenstein