World Championships: Dawn Harper-Nelson and Kendra Harrison crash out of 100m hurdles semi-finals
Former Olympic champion Dawn Harper-Nelson and fellow medal hopeful Kendra Harrison both suffered heartache in contrasting fashion in the 100 metres hurdles semi-finals at the World Championships on Friday.
The American duo failed to progress to the final in dramatic circumstances, Harper-Nelson falling at the second hurdle in her semi-final and Harrison disqualified for a false start minutes later.
Harper-Nelson, hoping to capitalise on a broken wrist that forced Olympic champion Sally Pearson to miss the athletics showpiece, looked in confident mood prior to taking her place in the starting blocks, playfully bowing as her name was announced to the expectant crowd at the Bird's Nest in Beijing.
But that quickly disappeared as she failed to successfully clear the second hurdle and ended up knocking down the third as well.
The 31-year-old looked visibly stunned and close to tears as she made her way off the track, Jamaica's Danielle Williams winning the semi-final.
Meanwhile, Harrison was forced to wait ashen faced as officials reviewed footage of her start. An official then branded the red and black card, but Harrison was initially confused over the meaning as she turned round and appeared to say: "What does that mean?"
Harrison sought clarification of the rules from an official before she was eventually ushered from the track, clearly disappointed at the decision.