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 beat fellow Jamaican and rival Yohan Blake.

***

It completed an incredible weekend of action at London 2012 - during which Team GB won 8 gold medals to take their tally to 16.

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.

But he admits he's not sure he can do it all again in Rio in 2016:

CLIP