The confirmed test sets off what could now be months of appeals and arguments by Landis, who claims the positive finding was due to naturally high testosterone levels. He has repeatedly declared his innocence and vowed to fight the allegations -- and did so again Saturday.
"I have never taken any banned substance, including testosterone," Landis said in a statement. "I was the strongest man at the Tour de France, and that is why I am the champion.
"I will fight these charges with the same determination and intensity that I bring to my training and racing. It is now my goal to clear my name and restore what I worked so hard to achieve."