RIO DE JANEIRO, BRAZIL - AUGUST 17: Olympic gold medallist Usain Bolt of Jamaica warms up prior to the 'Mano a Mano' Men's 100m challenge at Copacabana beach on August 17, 2014 in Rio de Janeiro, Brazil. (Photo by Buda Mendes/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 17: Olympic gold medallist Usain Bolt of Jamaica warms up prior to the 'Mano a Mano' Men's 100m challenge at Copacabana beach on August 17, 2014 in Rio de Janeiro, Brazil. (Photo by Buda Mendes/Getty Images)