Jamaica's Usain Bolt gestures to the crowd before the start of the final of the men's 4x100m relay athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 12, 2017 AFP
Justin Gatlin of the United States, left, checks on Jamaica's Usain Bolt, second right, who is assisted by his teammates after he pulled up injured in the final of the Men's 4x100m relay during the World Athletics Championships in London Saturday, Aug. 12, 2017 AP
United States' Christian Coleman, left, and Jamaica's Usain Bolt compete during the men's 4x100m final at the World Athletics Championships in London Saturday, Aug. 12, 2017 AP
Athletics - World Athletics Championships 4 x 100 meters relay final London Stadium, London, Britain August 12, 2017 Usain Bolt of Jamaica stumbles injured Reuters
Britain's Nethaneel Mitchell-Blake (3L) crosses the finish line first ahead of US athlete Christian Coleman (3R) in second place and Japan's Kenji Fujimitsu (L) as Jamaica's Usain Bolt (C) goes down injured in the final of the men's 4x100m relay athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 12, 2017 AFP
Athletics - World Athletics Championships 4 x 100 meters relay final London Stadium, London, Britain August 12, 2017 – Usain Bolt of Jamaica falls down injured Reuters
Jamaica's Usain Bolt goes down injured in the final of the men's 4x100m relay athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 12, 2017 AFP
Jamaica's Usain Bolt reacts after injuring himself in the final of the men's 4x100m relay athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 12, 2017 AFP
TOPSHOT - Jamaica's Usain Bolt reacts after pulling up injured in the final of the men's 4x100m relay athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 12, 2017 AFP
Jamaica's Usain Bolt lies on the track after pulling up injured in the final of the men's 4x100m relay athletics event at the 2017 IAAF World Championships at the London Stadium in London on August 12, 2017 AFP