
Usain Bolt (C) of Jamaica lies on the track after pulling up injured in the Men's 4x100m Relay Final on Day 9 of the 2017 IAAF World Championships at London Stadium in London, Britain, on Aug. 12, 2017. (Xinhua/Han Yan)

Usain Bolt (C) of Jamaica lies on the track after pulling up injured in the Men's 4x100m Relay Final on Day 9 of the 2017 IAAF World Championships at London Stadium in London, Britain, on Aug. 12, 2017. (Xinhua/Han Yan)