Yohan Blake interview before the greatest show on earth

World champion Yohan Blake is the fastest man this year, but come this weekend, the Jamaican is expected to face at least three persons who over the years ran faster times. Usain Bolt is the world record holder with 9.58secs, American Tyson Gay is next best with 9.69 and Asafa Powell, who held the world record for three years, is third on the list at 9.72.