Samuel Wanjiru misses London Marathon

Olympic champion Samuel Wanjiru has been forced to pull out of next month's Virgin London Marathon with a knee problem but three-time winner Martin Lel has been added to the field.

Wanjiru won in London in 2009 but dropped out at halfway last year through injury and has not raced since winning the Chicago Marathon last October.

The Kenyan, whose wife Triza Njeri dropped attempted murder charges against him earlier this year, said: "I am bitterly disappointed not to be able to race in London this year."

Lel won in London in 2005, 2007 and 2008 and, after two years of his own injury problems, the Kenyan now believes he is in shape to challenge for a fourth title.