German cyclist Stefan Schumacher, who failed a drugs test at the Tour de France, said Thursday he will sue the French anti-doping authorities (AFLD) for defamation.
"I have been judged and pilloried. My conscience is clear," Schumacher, who has always denied doping, told his website.
"I don't want to stop here and I will not stop here. The people who have always believed in me and continue to do so don't deserve this."
Schumacher is one of four riders to have failed a drugs test at this year's Tour de France.
The German rider caused a minor sensation when he won both time trials, leaving
At the start of October, the German cycling federation received documents confirming a double positive test for Schumacher.
The AFLD claimed the rider tested for the EPO blood booster Cera on July 3, two days before the start of the Tour and on July 15, a rest day at