BEIJING, CHINA - AUGUST 20: Usain Bolt of Jamaica talks with the media during a press conference prior to the beginning of the IAAF World Championships on August 20, 2015 in Beijing, China. (Photo by Andy Lyons/Getty Images)
BEIJING, CHINA - AUGUST 20: Usain Bolt of Jamaica talks with the media during a press conference prior to the beginning of the IAAF World Championships on August 20, 2015 in Beijing, China. (Photo by Andy Lyons/Getty Images)