Kenyan Rita Jeptoo, winner of the Boston and Chicago marathons for the last two years, has been banned from the sport for two years after failing a drugs test, Athletics Kenya said on Friday. “AK followed due process in her (Rita Jeptoo) matter and it was appropriate that she serves a two-year ban,” Athletics Kenya chief executive Isaac Kamande told Reuters. Jeptoo has denied doping, telling reporters last year that the accusations against her were “lies”.