Ethiopian Tigst Assefa won the London Marathon in a world record for a women's only race, while Kenyan Sabastian Sawe took the men's title to further his argument as the world's top male marathoner.

Degitu Azimeraw, who won the Amsterdam Marathon in a course record as a 20-year-old last year, and fellow Ethiopian and top coach Haji Adelo, will be absent from Sunday's London Marathon after testing ...