Olympic champion Samuel Wanjiru has pulled out of this month's London Marathon because of a knee injury but fellow Kenyan and another former winner Martin Lel will race.
Wanjiru, who won gold in Beijing in 2008 and the London Marathon a year later, has not raced since winning the Chicago Marathon in October.
Lel, winner in London in 2005, 2007 and 2008, has asked to be added to the field after recovering from his own injury problems.
