AIGLE, Switzerland -- The International Cycling Union says final anti-doping analysis from the Tour de France showed no more positive tests, leaving one case from the 2012 race.
Frank Schleck tested positive for a diuretic called Xipamide on July 14 and was pulled from the three-week race.
The Luxembourg Anti-Doping Agency has sent the RadioShack Nissan Trek rider's case to its disciplinary committee.
Schleck denies doping, and anti-doping rules classify the diuretic as a "specified substance" which is "more susceptible to a credible, non-doping explanation."
Cycling's governing body says laboratories in France, Germany and Switzerland analyzed riders' doping control samples from the Tour.
The UCI says "samples received from the ... laboratories all showed a negative result."