Greene fails to defend world title

Defending world 400m hurdle champion Dai Greene fails to qualify for the final at the World Athletics Championships, after coming fifth in his semi-final.

GB's Rhys Williams and Sebastian Roger also failed to make Thursday's final in Moscow, while Cuba's Omar Cisneros was fastest of those who qualified.

Welshman Greene said he needed an extra week to prepare for the championships after returning from injury.

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