MADRID -- Tour de France winner Alberto Contador threatened to sue various media and websites Friday for defamation after reports that his urine sample showed indications of possible blood doping.
In a statement issued late Friday by his press officer Jacinto Vidarte, the rider said he will "take legal actions against defamatory information published so far by various media and websites, due to their absolute lack of veracity."
He did not specify which media outlets or specify the allegations.
The three-time Tour de France champion was provisionally suspended by the international cycling federation last week after a small amount of the banned drug clenbuterol was discovered in one of his samples by a laboratory in Cologne, Germany.
Contador reiterated his claim that the positive test was caused by "food contamination" and vehemently denied speculation that he also engaged in blood transfusions during the race.
On Tuesday, a person with knowledge of the test results told The Associated Press that a urine sample taken from Contador showed abnormally high levels of plastic residues that could indicate he received a transfusion of his own blood.
That test was taken the day before the clenbuterol was detected on July 21, the Tour's final rest day, said the person, who spoke on condition of anonymity because the investigation by cycling officials is ongoing. Contador's abnormal sample showed eight times the normal amount of the plasticizer, the person said.
The plasticizer test result was also reported last week by French sports daily L'Equipe and German television network ARD. The New York Times reported on the finding Tuesday.
Contador called on the International Cycling Union to provide a quick resolution to his case so as to halt future speculation.
"The rider asks the sport authorities and especially the ICU, to provide a quick resolution of this case, as this is the best way to end the speculations and the publication of false and defamatory news about his person," the statement said.