Spanish drug testing officials acting for the US Anti-Doping Agency went looking for Vuelta a Espana winner Chris Horner this morning to administer an out-of-competition test, but were unable to find him, according to reports from Spain.

However, Horner’s Radio Shack-Leopard team claims that he had updated his whereabouts on the Anti-Doping and Management System (ADAMS) system the previous day and the testers were simply looking in the wrong place.

Horner was not at the Hotel Princesa in Madrid, where the rest of the team were staying. The testers apparently went to another hotel in search of Horner, but did not find him there either.

A team spokesman told cyclingnews.com: "There is no problem. 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."

RadioShack-Leopard press officer Tim Vanderjeugd subsequently tweeted: "The second hotel they went to was a randomly picked Ibis where they thought he could be."

The team later issued the following statement, accompanied by a screenshot of an automated email from USADA acknowledging Horner’s registered whereabouts at 6am to 7am this morning.

The management of RadioShack Leopard Trek wants to clarify the situation about the alleged missed out of competition anti-doping test of Chris Horner.

Chris Horner updated his whereabouts with USADA before the start of the final stage, giving the agency the name of his hotel for the night, phone number and room number for his one hour window between 6 and 7 AM. This is all according to the rules and Chris Horner received a confirmation email.

The anti-doping inspectors from the Spanish Anti-doping Agency that were asked to do the test by the United States Anti-Doping Agency (USADA) showed up at the wrong hotel in Madrid, where the team was staying but Horner was obviously not to be found.

The team believes the communication between the Spanish Anti-doping Agency and the media is a violation of the privacy of Chris Horner, especially since it comes down to a clear mistake by the tester.

The team asks the media to report correctly on this matter and will seek compensation for this matter with the responsible anti-doping agencies.

Horner was sought for testing under World Anti-Doping Agency rules that apply to top-level athletes. Athletes in the program must register their whereabouts for a one-hour period each day between 6 am and 11 pm.

If an athlete cannot be found three times in 18 months at his or her specified locations, and cannot satisfactorily explain those absences, then they are subject to a disciplinary proceeding by the relevant anti-doping agency. Sanctions range between one and two years.