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(CNN) -- Dai Greene completed a memorable hat-trick of titles ahead of next year's Olympics in London by storming to victory in the 400 meters hurdles at the world championships in Daegu Thursday.

Greene, already the European and Commonwealth champion in the discipline, added the global crown to his tally with a scintillating performance to give Britain their first gold of the week.

He surged off the final hurdle to overtake Puerto Rico's Javier Culson with LJ van Zyl of South Africa taking the bronze. Double Olympic champion Angelo Taylor, troubled by a foot injury, finished out of the medals.

Greene, whose winning time was 48.26 seconds, timed his move perfectly in a race disrupted by two faulty starts and cool and windy conditions.
Coming off the last hurdle I had so much momentum
Dai Greene

"Coming off the last hurdle I had so much momentum," Greene told Channel 4. He will go into next year's London Games as favorite to complete the full set of medals in major championships.

Greene said he had been inspired by the surprise silver medal of teammate Hannah England in the women's 1500 meters final which preceded his event.

(CNN) -- Controversy struck the world athletics championships in Daegu for the second straight day as Cuba's Dayron Robles was disqualified Monday after winning the men's 110m hurdles final.

Robles, defending the title he won in Berlin two years ago, crossed the line first in 13.14 seconds, ahead of American Jason Richardson (13.16) and 2004 Olympic champion Liu Xiang of China (13.24).

But the Cuban was judged to have made contact with Liu to impede him as they came off the final hurdle.

"Robles has been disqualified by the track referee under rule 163.2 for obstruction on the track," said an statement from world governing body, the IAAF.

Cuba launched an appeal against the decision, but it was dismissed, leaving Richardson to take a surprise gold, former world record holder Liu was elevated to silver with Britain's Andy Turner up to bronze. Liu, making a strong comeback after injury ruined his gold medal bid at the Beijing Olympics, had led until the final hurdle, which he clipped, leaving Robles and Richardson to go past him.

The disqualification of Robles came just 24 hours after Jamaica's defending 100m champion Usain Bolt was thrown out for a false start in the final won by compatriot Yohan Blake.