7 July 2012 Last updated at 10:31

Dai Greene sets personal best in 400m hurdles

Welshman Dai Greene sets a new personal best in the 400m hurdles at the Diamond League in Paris with a time of 47.84 seconds.

The reigning world 400m hurdles champion finished second behind Javier Culson, who won in a world-leading 47.78.

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