Gatlin runs fastest 100m this year

Justin Gatlin wins the 100m at the Diamond League event in Shanghai in 9.92 seconds.

Nesta Carter of Jamaica came second, Michael Rodgers of the USA was third, with Great Britain's Dwain Chambers finishing seventh.

Gatlin won silver in the 2013 World Athletics championship in Moscow, where he was beaten by world record holder Usain Bolt.

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