Athletics: Injured Rudisha's world title defence in doubt

David Rudisha (right) representing Kenya, competes in the Men's 800m during the IAAF Diamond League Grand Prix competition on Randall's Island in New York on May 25, 2013. Rudisha's defence of his world 800m title in Moscow next month is in doubt bec
David Rudisha (right) representing Kenya, competes in the Men's 800m during the IAAF Diamond League Grand Prix competition on Randall's Island in New York on May 25, 2013. Rudisha's defence of his world 800m title in Moscow next month is in doubt because of a knee injury, the Kenyan's coach said on Wednesday, July 11, 2013. -- FILE PHOTO: AP

NAIROBI (REUTERS) - David Rudisha's defence of his world 800 metres title in Moscow next month is in doubt because of a knee injury, the Kenyan's coach said on Wednesday.

"He is progressing on well, but I doubt if he will heal early enough to resume training for the world championships,"Rudisha's coach Colm O'Connell told Reuters by telephone from Iten, some 400 km north west of Kenyan capital Nairobi.

Rudisha, who set a world record of 1:40.91 winning the Olympic title last year in London, picked up the knee injury running in Central Park in New York City.

The 24-year-old is being treated in Germany and is expected to miss the east African nation's trials on Saturday.