Usain Bolt, an eight-time Olympic champion, the fastest man in history, will retire after the IAAF World Championships in London. We look into the numbers that make the 30-year-old Jamaican the greatest sprinter to have lived.
Eight-time Olympic champion Usain Bolt will retire from athletics after the IAAF World Championships, which start on August 4. He has dominated his sport for almost 10 years - but how well do you know the Jamaican?
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