Disgraced cyclist Lance Armstrong admits he is culpable for Tour de France leader Chris Froome fielding questions on doping.
But the 43-year-old American, who was stripped of his record seven Tour titles for using performance-enhancing drugs, has no regrets about commenting on Twitter on Froome's victory on Tuesday's 10th stage to La Pierre-Saint-Martin to increase his yellow jersey advantage.
Armstrong, who will return to the roads of the Tour today for a charity ride alongside former England footballer Geoff Thomas, fielded questions on Twitter about Froome's performance and reacted, writing: "Too strong to be clean? Don't ask me, I have no clue."
Speaking yesterday, he said: "I get those questions all the time, and the question is: Can this be believed? Are these guys clean? Is everybody like you?"
"I put it out there as, 'Don't ask me that question because I don't know that answer'.
"I tried to clarify it even later by saying I don't have any credibility on that issue, I know that.
"I know what it's like for a guy like Chris to be in the middle of a Tour to deal with the constant questions which of course he is, and to be fair and to be honest to him a lot of that is my fault.
"Whoever is winning the Tour de France in 2015 should not be answering questions about somebody that won it 10 or 15 years ago. That's just not legitimate, that's not true."