Controversial cyclist Lance Armstrong is expected to give a limited confession to Oprah Winfrey but will not provide full details of the alleged doping that took place during his career.
Armstrong is ready to speak candidly as he prepares to discuss doping allegations against him in this week's Winfrey interview.
Armstrong will not divulge what he will say in Monday's interview, that is to be broadcast Thursday (Friday AEDT) on the Oprah Winfrey Network.
"I'm calm, I'm at ease and ready to speak candidly," he told AP. "I hope we'll talk for a couple of hours."
A person with knowledge of the situation says Armstrong will give a limited confession and apologise - his first public response to the US Anti-Doping Agency (USADA) report accusing him of using banned drugs to win the Tour de France.
The interview is not expected to go into great detail about specific allegations in the extensive USADA report.
In a text message to AP on Saturday, Armstrong said: "I told her (Winfrey) to go wherever she wants and I'll answer the questions directly, honestly and candidly. That's all I can say."
Armstrong has spent more than a decade vehemently denying he doped to win the Tour de France seven times. A confession would be a stunning reversal after years of public statements, interviews and court battles.
Armstrong was stripped of his cycling titles and banned from the sport for life last year after the USADA report accused him of leading a sophisticated US Postal Service team drug program, including the use of steroids, blood boosters and other performance-enhancing drugs.
With his reputation in crisis, Armstrong also has to be careful in the interview as he faces legal challenges on several fronts.
Former teammate Floyd Landis, who was stripped of the 2006 Tour title, has accused him of defrauding the Postal Service. The Justice Department has yet to announce whether it will join the case.
And the London-based Sunday Times is suing Armstrong to recover about $US500,000 ($A474,000) it paid him to settle a libel lawsuit.
The paper has taken out an advertisement in the Chicago Tribune with 10 questions they want Oprah Winfrey to ask Armstrong.
The Sunday Times was one of the few publications to openly query Armstrong's innocence during his career.