Rhys Williams misses automatic qualification in 400m hurdles

Rhys Williams failed to qualify in the top three for Great Britain in the fourth heat of the 400m hurdles.

The Welshman could still make the semi-finals as one of the fastest losers once all the heats are completed. However, he struggled to get off to a bright start and started slipping behind midway around the track.

Puerto Rico's Javier Culson, who is arguably Dai Greene's biggest threat for gold, crossed the finish line first with a time of 48.33s.

Meanwhile, Greene got off to a positive start in his Olympic campaign, winning his heat with a time of 48.49s.