(CNN) -- It will take more than a television interview to reduce sanctions against Lance Armstrong, the World Anti-Doping Agency said Tuesday as Oprah Winfrey spoke out about her interview with the disgraced cyclist.
"Only when Mr. Armstrong makes a full confession under oath -- and tells the anti-doping authorities all he knows about doping activities -- can any legal and proper process for him to seek any reopening or reconsideration of his lifetime ban commence," agency Director General David Howman said.
Armstrong came "ready" for the interview Monday with Winfrey, the long-time TV talk show host said Tuesday. The interview will air in two parts, Thursday night and Friday night, on Winfrey's OWN cable network and the Internet, she said.
Speaking with her close friend Gayle King on "CBS This Morning," Winfrey would not give specific quotes from the interview. But she appeared to confirm multiple media reports that the former seven-time Tour de France champion used the occasion to acknowledge having used performance-enhancing drugs.
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