Intro:

Usain Bolt, 27, reveals he plans to retire from athletics in 2017. The world's fastest man is competing in a 100m challenge on Rio de Janeiro's Copacabana beach in Brazil on Sunday.

Script:

SOUNDBITE (English) Usain Bolt:

"For me, I think I might go one more year, my sponsors have asked me to do one more year, so I mean go on to 2017. Definitely looking forward to coming to Rio because this is where I can try to make... push my legend status to a higher level."

SOUNDBITE (English) Usain Bolt:

"For me, definitely I've said I've wanted to try professional football to see if I'd be any good - I think I will be, but you never know. When it comes to being a coach... no... I don't want to be a coach, I see what I put my coach through through the years, so I really don't want to go through that with any athletes. So I'll just chill out. But other than professional football, I just want to be a lazy person... be a 'bum' at home."

SOUNDBITE (English) Usain Bolt:

"I don't know how fast I can run, I haven't really done a lot of competitions so I can't really say. But after the four by one [4 x 100 metres] in Glasgow [2014 Commonwealth Games] I felt pretty good, I felt smoother. So I think the more I run the faster I run, so this race on the beach is just going to be a test really to see where I'm at. But I think I should under ten seconds no problem, so I'm looking forward to going out and doing my best."