16th IAAF World Athletics Championships London 2017 - Day Six [Getty Images]

LONDON, ENGLAND - AUGUST 09: Phyllis Francis of the United States and Allyson Felix of the United States race to the finish line ahead of Shaunae Miller-Uibo of the Bahamas in the Women's 400 metres final during day six of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 9, 2017 in London, United Kingdom. (Photo by Matthias Hangst/Getty Images)

Getty Images Sport Matthias Hangst