Lance Armstrong said Wednesday he will cooperate with a "fair investigation" but not a "witch hunt" into allegations that he and his former cycling team were involved in doping.

Federal prosecutors investigating cheating in professional cycling have subpoenaed documents from a 2004 case in which a Texas company tried to prove Lance Armstrong used performance enhancing drugs.

Lance Armstrong's RadioShack team is facing disciplinary proceedings because its riders wore unapproved jerseys to the Tour de France's final stage, causing a 20-minute delay at the start.

Alberto Contador won his third Tour de France on Sunday, heralding the arrival of a new cycling superstar, as seven-time champion Lance Armstrong competed in the race for the last time.

Alberto Contador is set to win his third Tour de France title in four years after retaining the yellow jersey in the next-to-last stage on Saturday. Fabian Cancellara won the time trial, but the 27-year-old Contador held on to his razor-thin lead over Andy Schleck of Luxembourg, who had started the 19th stage in second place, 8 seconds back.

Former professional cyclist Tyler Hamilton has been subpoenaed to appear before a grand jury, though his attorney refused to say whether it has anything to do with a federal investigation involving former teammate Lance Armstrong.

Banned rider says friend and former teammate cheated during record-setting career.

Alberto Contador never wavered.

The riders of the Tour de France have been disrupted by sheep running across their path on a hard climb up the Pyrenees mountains.

Lance Armstrong has hired a criminal defense attorney to represent him in the federal investigation for possible fraud and doping violations by the seven-time Tour de France winner and his cycling teammates.

3-time champion LeMond questions Spaniard's rapid climb in Stage 15

Three-time Tour de France winner Greg LeMond says he believes evidence against Lance Armstrong in a federal probe will be "overwhelming."