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BEIJING, CHINA - AUGUST 23: (L-R) Usain Bolt of Jamaica, Bingtian Su of China, Andre De Grasse of Canada, Trayvon Bromell of the United States and Christophe Lemaitre of France cross the finish line in the Men's 100 metres semi-final during day two of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 23, 2015 in Beijing, China. (Photo by Cameron Spencer/Getty Images)

BEIJING, CHINA - AUGUST 23:  (L-R) Usain Bolt of Jamaica, Bingtian Su of China, Andre De Grasse of Canada, Trayvon Bromell of the United States and Christophe Lemaitre of France cross the finish line in the Men's 100 metres semi-final during day two of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 23, 2015 in Beijing, China.  (Photo by Cameron Spencer/Getty Images)