
According to the report, the French anti-doping laboratory at Chatenay-Malabry, using the Isotope Ratio Mass Spectrometry (IRMS) procedure, found testosterone not produced by the body in the urine sample of a Tour rider after the 11th stage.
The International Cycling Union (UCI) is to announce the name of the cyclist very soon, L'Equipe said.
The IRMS procedure was also used to detect the presence of synthetic testosterone in the samples of last year's Tour winner, Floyd Landis. dpa