The Canadian cyclist Ryder Hesjedal, who won the Tour of Italy last year, has admitted he had doped "more than 10 years ago".
The statement came in response to allegations by Dane Michael Rasmussen who said earlier today he taught Hesjedal how to take the banned blood-booster EPO in 2003.
Rasmussen was kicked out of his Rabobank team while he was leading the Tour de France in 2007 for having lied about his whereabouts to doping authorities.
Rasmussen was at Rabobank in 2003 while Hesjedal, then a mountain bike rider, was in the Dutch outfit's development team.
Hesjedal says he believes being truthful will help the sport continue to move forward.
He says when he was contacted by anti-doping authorities a year ago he was open and honest about his past.
Hesjedal was one of Lance Armstrong's team mates at U.S. Postal and Discovery Channel in 2004 and 2005.