The fastest man in the world has defended his 100 metre crown - breaking his Olympic record in the process.

Usain Bolt clocked 9-point-63 seconds to win a blistering final last night.

***

For Team GB yesterday - Andy Murray won the men's singles tennis, while Lymington's Ben Ainslie took the Finn class at Weymouth - to become Britain's most decorated sailor.

***

Ian Percy and Sherborne's Andrew Simpson had to settle for silver in the Star class sailing.

And defending champion Christine Ohurougu also came second in the women's 400 metres last night.