
Trey Hardee of the United States falls down as Kevin Mayer of France sprints during 110m Hurdles of Men's Decathlon on Day 9 of the 2017 IAAF World Championships at London Stadium in London, Britain, on Aug. 12, 2017. (Xinhua/Wang Lili)

Trey Hardee of the United States falls down as Kevin Mayer of France sprints during 110m Hurdles of Men's Decathlon on Day 9 of the 2017 IAAF World Championships at London Stadium in London, Britain, on Aug. 12, 2017. (Xinhua/Wang Lili)