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BEIJING, CHINA - AUGUST 23: Usain Bolt of Jamaica (R) wins gold ahead of (bottom to top) Justin Gatlin of the United States, Tyson Gay of the United States, Mike Rodgers of the United States and Trayvon Bromell of the United States during the Men's 100 metres 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 Ian Walton/Getty Images)

BEIJING, CHINA - AUGUST 23:  Usain Bolt of Jamaica (R) wins gold ahead of (bottom to top) Justin Gatlin of the United States, Tyson Gay of the United States, Mike Rodgers of the United States and Trayvon Bromell of the United States during the Men's 100 metres 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 Ian Walton/Getty Images)