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.

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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 Ben Ainslie took the Finn class to become Britain's most decorated sailor.

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

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