Red Bull's Sebastian Vettel has denied that he has signed any agreement to join Ferrari in the future.
BBC Sport reported two weeks ago that Ferrari already have a deal in place with the German, with an option for the 25-year-old to join them in 2014.
Vettel said: "There is nothing to tell, nothing I have signed. It is amusing. I don't know where it came from."
Vettel was dismissive of the claim and said he was concerned it could have caused problems at Red Bull.
"There is nothing to report and I am very happy at Red Bull Racing," he said.
His response was to a question as to whether he had any arrangement, or had had any talks, with Ferrari about his future.
Red Bull team principal Christian Horner says the team have a binding contract with Vettel to the end of 2014 and told BBC Sport: "Sebastian Vettel without a shadow of doubt, will be part of the Red Bull Racing team in 2014."
Ferrari sources continue to insist that there is an arrangement in place between the Italian team and Vettel with a view to him joining them.
They are not clear on the exact details but they say Vettel's long-term future will be at Ferrari.
Horner said afterwards: "Sebastian and the team have a very strong relationship. We both know exactly where we stand now and for the future.
"Of course all members read the media, they read the internet, so it was important to dispel any speculation that he may be going elsewhere. I did that on the day the rumours were circulated.
"Sebastian has been with Red Bull since he was 12 or 13 years of age. He has achieved all his grand prix victories in Red Bull-designed cars.
"He is very happy being part of this team and he is an important part of this team and hopefully that will continue for many years to come."
Asked if he expected Vettel's next contract to be with Red Bull, Horner said: "I can't think of any driver that wouldn't want a contract with Red Bull at the moment."