Eight-time Olympic champion Usain Bolt will retire from athletics after the IAAF World Championships, which begin today (August 4).
He has dominated his sport for almost 10 years - but how well do you know the Jamaican?
Can you reel off his freakishly quick times? How much do you really know about chicken nuggets?
Will you revel in glory like the great sprinter or be an also-ran like his competitors? There's only one way to find out! Try CNN Sport's quiz to prove your sporting knowledge.