According to the International Olympic Committee's Dick Pound, cycling could be dropped from future Olympic games.
Pound has said that the sport could be axed if the IOC think that cycling union the UCI knew about Lance Armstrong who has admitted to doping in an interview with Oprah Winfey.
You can see the interview on The Discovery Channel at 2am on Friday morning, repeated at 8pm on Friday night.
UCI have said in a press statement: "The UCI will not be making any further comments on matters concerning Lance Armstrong until it has had the opportunity to view his much publicised interview with Oprah Winfrey.
"The UCI notes the media speculation surrounding the interview and reports that he has finally come clean and admitted doping during his cycling career."
"If these reports are true, we would strongly urge Lance Armstrong to testify to the Independent Commission established to investigate the allegations made against the UCI in the recent USADA reasoned decision on Lance Armstrong and the United States Postal Service (USPS) team."