Trek Factory Racing have confirmed Fabian Cancellara will attempt to break the world hour record this year but denied reports that it will take place in Mexico on August 3.
The Italian sports newspaper Gazzetta dello Sport claimed the Swiss rider would make his bid this summer in Aguascalientes, a track renowned for being fast, but Trek released a statement on Wednesday that insisted no date or venue had yet been decided.
The team's general manager, Luca Guercilena, said: "We haven't taken any decision whatsoever about the time and the place for an attempt. The team will communicate in the appropriate time. Any other information that circulates around a possible attempt is premature."
The hour record currently stands at 49.7km, set by Czech rider Ondrej Sosenka in Moscow in 2005.
Guercilena confirmed planning for Cancellara's attempt to break that mark had been ongoing for several months.
He added: "We are working on this project since some time now and we have a series of people managing the project, including engineers at Trek Bicycle.
"However, there is no present-day reference for this kind of endeavour and we are still studying all of its facets. We are in discussions with several tracks around the world and, in terms of timing, I can only confirm that we are no longer considering the period after the Classics for an attempt.
"The focus for Fabian is now fully on the Classics and an attempt to repeat the success of last year. After Paris-Roubaix, we will turn our attention to the hour record and we will have more details."
Cancellara, 32, is a four-time world time trial champion.