Diagana pulls out of 400 metres hurdles SYDNEY, Sept 14 (Reuters) - Frenchman Stephane Diagana, 400 metres hurdles world champion in 1997 and silver-medallist last year, pulled out of the Olympics with a knee injury, the French federation said on Friday. Hampered by the injury to his right knee for the past month, Diagana, 31, had been training in Perth for the past two weeks, hoping to be fit in time for the Olympic competition. But a test on Friday ruled him out. ..................................