Bolt to chase sprint double

Jamaican 100m world record holder Usain Bolt will run both the 100 and 200m at the Beijing Olympics, his coach said on Saturday.

Bolt had always said he wanted to run both sprint races but his coach Glen Mills had been hesitant to allow the 21-year-old world 200m silver medallist to add the 100 to his Olympic hopes.

The decision sets up the biggest race of the Olympics with Bolt facing compatriot and former world record holder Asafa Powell and American world champion Tyson Gay.

Bolt took the 100 metres record from Powell when he ran a stunning 9.72 seconds at New York on May 31.