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BEIJING, CHINA - AUGUST 23: Usain Bolt of Jamaica (C) crosses the finish line to win gold in the Men's 100 metres final as Justin Gatlin of the United States (L) wins silver 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 Andy Lyons/Getty Images)

BEIJING, CHINA - AUGUST 23:  Usain Bolt of Jamaica (C) crosses the finish line to win gold in the Men's 100 metres final as Justin Gatlin of the United States (L) wins silver 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 Andy Lyons/Getty Images)