Seven-time Tour de France winner Lance Armstrong will be charged by the US Anti-Doping Agency for using performance-enhancing drugs.
The 40-year-old, who denies using any illegal substances, will have his case heard by an arbitration panel.
The American could have his titles removed and be banned from cycling if he is found guilty.
Armstrong retired from the sport in 2005 before making his comeback four years later. He then called time on his career again in 2011 before becoming a triathlete.
