Nine Olympic goal medals and 11 more in the World Championships.

Usain Bolt will retire as the greatest sprinter of all time. The World Record holder over 100 and 200 metres, Bolt also has the quickest time over 150 metres, but the distance is not recognised by the IAAF.

Having entered the final phase of such an illustrious career, a documentary, titled 'I Am Bolt' has been released about the Jamaican.

Cameras followed Bolt for 18 months as he prepared for his final Olympic Games. In Brazil, he defended his 100, 200 and 4x100 metre titles, to win what was called the triple-triple.

The trailer shows Bolt's doubts ahead of Rio when he asks "Every year, I worry; 'Am I still fast?'" By now, we all know the answer to that. 

'I Am Bolt' is globally released in November. 

Excited to share the trailer for @IAmBoltFilm, coming to cinemas everywhere November 28 #IAMBOLT pic.twitter.com/oeIfa3hyAy

— Usain St. Leo Bolt (@usainbolt) October 18, 2016