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

LONDON, ENGLAND - AUGUST 11: John Gregorek of the United States, Jordan Williamsz of Australia, Chris O'Hare of Great Britain, Marcin Lewandowski of Poland, Timothy Cheruiyot of Kenya and Jakub Holusa of Czech Republic compete in the Men's 1500 metres semi finals during day eight of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 11, 2017 in London, United Kingdom. (Photo by Matthias Hangst/Getty Images)

Getty Images Sport Matthias Hangst