Usain Bolt
Bolt will race for two more years before retirement (Reuters)

Usain Bolt will retire from athletics after the 2017 World Championships in London.

Bolt, a six-time Olympic gold medal winner, initially planned to retire after the 2016 Games in Rio de Janeiro.

But the 28-year-old will return to the city where he won three golds in 2012 before calling time on a record breaking career.

Bolt will however only concentrate on the 100m event in his final year in the sport.

"That was the initial plan (to sign off after Rio)," he told the Daily Mail. "But my sponsor has asked me to go on for another year; to 2017 and London.

"But I'll be doing one event, the 100. I've already discussed it with my coach. I can concentrate on that, and on retiring on a winning note."

Ahead of Rio next year, Bolt is targeting more success at the World Championships in Beijing in August where he will be seeking to add to his personal haul of eight world golds.

The Jamaican also has his eye on shattering his 100m record once again, which currently stands at 9.58 seconds.

"If everything goes well this season… in my life anything is possible. If I can get myself in good shape, it should be wonderful this season," he added.

"I live for competition. I thrive on competition. I live to compete against the best."