Armstrong not concerned by Landis claims

Seven-time champion Lance Armstrong insists "I sleep like a baby" after denying the ongoing investigation into doping allegations levelled at him by Floyd Landis was behind his poor Tour de France display.

An investigation was initiated by the United States' Food and Drug Administration after Landis, who was stripped of the 2006 Tour title after testing positive for testosterone, accused many of his former team-mates at the United States Postal Service team, including Armstrong, of doping.