Lance Armstrong, currently riding the final international race of his career in the Santos Tour Down Under, has been using his Twitter account to respond to fresh allegations of doping published on the website of American magazine Sports Illustrated.

As reported on road.cc earlier this week, the article that appeared on the Sports Illustrated website on Tuesday contains just some of the allegations expected to be published when the print copy of the magazine hits the newsstands next Monday.

On his Twitter feed, the seven-time Tour de France winner, who has always denied taking performance enhancing drugs, said: “Great to hear that @usada is investigating some of @SI’s claims. I look forward to being vindicated.”

That reference to @usada is presumably meant to denote the US Anti-Doping Agency, whose Twitter account is actually in the name @usantidoping; @usada is an account belonging to an individual from Tokyo who has just six followers.