TOKYO (Reuters) - World champion Grant Holloway blazed to the quickest time in the 110 metres hurdles semi-finals on Wednesday, the American bursting out of the blocks and looking smooth to come home in 13.13 seconds.

Compatriot Devon Allen posted the day's second-fastest time of 13.18, while the Jamaican duo of Hansle Parchment and Ronald Levy also qualified for the final and will look to challenge for the podium.