LONDON, ENGLAND - AUGUST 07: Lehann Fourie of South Africa prepraes to compete in the Men's 110m Hurdles Round 1 Heats on Day 11 of the London 2012 Olympic Games at Olympic Stadium on August 7, 2012 in London, England. (Photo by Stu Forster/Getty Images)

London - American Aries Merritt raced a scorching 12.94sec to lead all the favourites, including defending Olympic champion Dayron Robles, into Wednesday's 110m hurdles final.

In the absence of China's 2004 Olympic champion Liu Xiang, who crashed out in the heats on Tuesday, Merritt won his heat from Barbadian Ryan Brathwaite.

Merritt's US teammate Jason Richardson, the shock world champion from last year in Daegu, won his heat in 13.13sec, and Robles of Cuba clocked 13.10sec in winning the third semi-final.

Also going through to the final will be Jamaican Hansle Parchment and Cuban Orlando Ortega, with South African Lehann Fourie and Briton Lawrence Clarke advancing as the two overall fastest finishers outside the two automatic spots from each semi-final. - AFP