LONDON, Aug 12 (Reuters) - Australia's Sally Pearson completed one of the great sporting comebacks when she overcame two years of injury agony to win the world 100 metres hurdles title at the age of 30 on Saturday.
Pearson, world champion in 2011 and Olympic gold medallist in 2012, missed the last two seasons through hamstring and achilles injuries and a badly broken wrist but blasted back to win in 12.59 seconds, screaming "oh my God" repeatedly after crossing the line.
"I've worked so hard, I don't know what has just happened out there. I'm so tired but I'm sure it will sink in soon," Pearson said.
Dawn Harper Nelson, who won gold at the 2008 Olympics and was one of four Americans in the final, took silver in 12.63 ahead of Germany’s Pamela Dutkiewicz (12.72).
Favourite Kendra Harrison, who set the world record in the London Stadium last year having missed out on Olympic selection, again clattered too many barriers as she did in the semis and finished fourth in 12.74.
Defending champion Danielle Williams of Jamaica failed to make the final while last year's Olympic champion Brianna Rollins is banned for a doping violation.
Editing by Ed Osmond