The German television channel ZDF claimed to have uncovered UCI violations of the WADA's doping control regulations. The Germans claimed that many riders who were selected for controls after stages went to the controls alone and with a significant time delay after the end of the stage.
The WADA requires that the athletes be escorted from the moment they are notified that they are to be tested.
Ullrich Hass, a sports law expert who is also a judge at the international Court of Appeals for Sport, told the ZDF that without an official escort, riders would have the chance for manipulation before giving a urine sample. The UCI did not have a comment on the situation.