HOBBLING sprint star Maurice Greene will take no further part in the World Championships.
Greene limped away after winning a third successive 100metres gold medal early yesterday in Canada.
And the American has now been forced to give in to a dodgy hamstring and an injured knee.
Coach John Smith feels the rest of Greene's season is also in doubt.
The world's fastest man had earlier pulled out of defending the 200m title he claimed two years ago in Seville but hoped to be able to run for the US team in the 4x100m relay at the weekend.
However, last night any pain from his body was masked by the euphoria of his medal hat-trick.