Disgraced bicycling legend Lance Armstrong will reportedly 'fess up to using performance-enhancing drugs during his interview with Oprah Winfrey this week, but if you're hoping for any big reveals in the first promo for the sit-down, you're bound to be sorely disappointed.

The clip, which hit YouTube on Tuesday, is long on suspense and short on detail. In the clip, Winfrey tells Armstrong -- who was stripped of his multiple Tour de France wins last year by the U.S. Anti-Doping Agency, which cited evidence that he had used banned substances -- that "we agreed that there would be no conditions on this interview, and this would be an open field. So here we go."

Also read: Oprah on Lance Armstrong: "He Did Not Come Clean in the Manner I Had Expected" [5]

Aaaand .... that's as far as it goes, in terms of content from the interview.

While reports have indicated that Armstrong would use the interview -- his first since being stripped of his titles -- to admit his use of banned substances, Winfrey told "CBS This Morning" on Tuesday that the cyclist "did not come clean in the manner I had expected."

Maybe she meant that he did so while wearing a propeller beanie and juggling bowling pins while riding a unicycle?

Time will tell, but whatever the case, Winfrey clearly plans on milking the interview for all she can. The sit-down, which was originally scheduled to air as a 90-minute episode of "Oprah's Next Chapter" on Thursday, has been extended to a second night on Friday.

Until then, watch the promo.