Less than 24 hours after his historic Vuelta a Espana win, Chris Horner (Radioshack) is in the headlines for all the wrong reasons. According to Spanish newspapers AS and Marca, Horner missed an anti-doping control this morning but his teams refuses the claims, saying that he updated his whereabouts prior to Sunday's stage.

Yesterday, Chris Horner became the oldest ever winner of a grand tour when he stepped onto the podium in Madrid to celebrate his Vuelta a Espana victory. Today he finds himself in the unpleasant situation of being accused of an anti-doping rule violation.

According to Spanish newspapers AS and Marca, anti-doping testers from the Spanish Anti-Doping Agency were unable to locate early this morning when they visited the Radioshack team hotel to conduct a test. Apparently, they also visited another hotel but were unable to find the Vuelta a Espana.

During the race, anti-doping testing is left to the UCI and hence his national anti-doping agency USADA had to wait to the conclusion of the race to do their controls. They asked their Spanish colleagues to carry out the testing but the Spaniards never managed to do so.

His Radioshack team has reacted with anger to the news, stating that Horner had updated his whereabouts on Sunday morning prior to yesterday's final stage. The American chose to stay in a different hotel with his wife and apparently specified both the name of the hotel and his room number when he updated his information.

“There is no problem" press spokesman Philippe Maertens told Cyclingnews. "The USADA went to the wrong hotel. They went to the team hotel but he is in another hotel. He had mentioned this in his ADAMS. They should do their administration more correctly than they did. They need to check their whereabouts too."

The team has issued a statement, showing screenshots of the confirmation e-mails Horner received when he had updated his whereabouts.

Horner is now travelling back to the USA with his wife. If Horner can't justify the missed test, it will be declared a "no-show". Three no-shows in a period of 18 months can lead to a suspension.