David Weir said he is feeling "confident" as he prepares to defend his London Marathon title while competing in the race for the 20th time.
The 39-year-old, who has won eight elite men's wheelchair titles in his home city, said he feels "in good shape" despite a "frustrating" few months.
His preparation has been hampered by a car crash in December, illness and an infection in his foot which forced him to drop out of the Boston Marathon earlier this month, partly because he did not want to risk missing the London race, and he also missed the Tokyo Marathon in March.
