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

LONDON, ENGLAND - AUGUST 06: (L-R) Australia's Jessica Trengove, US athlete Serena Burla and US athlete Amy Cragg compete in the Women's Marathon during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Ben Stansall - Pool /Getty Images)

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