Sebastian Vettel has again downplayed speculation that he is planning to leave Red Bull for Ferrari in the coming years.

Rumours have suggested that the German was set to join forces with Fernando Alonso from 2014 onwards, with Felipe Massa's new deal with the Maranello-based team being a stop-gap deal before the German was brought in.

Both Ferrari and Red Bull were quick to try and dispel the rumours, while Vettel himself had also denied a deal with Ferrari had been signed.

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It didn't prevent the issue being raised on the post-race press conference after Vettel had taken victory in India, with the German reiterating his stance in order to re-affirm his commitment to his current team.

"There's nothing, nothing to tell you, nothing I've signed," he sai. "Nothing has changed. It's quite amusing. I don't know where it came from but... I don't read much, so it's quite a surprise when you get to the circuit and get all these questions. Nothing to report. As I said, I can't be happier at the moment.

"There's one thing I would like to say about this. You don't know every single person in the team, and it's hard to speak to every single one, so if there's - sorry to say - some bullshit in the press, obviously there might be some concerns back in the factory.

"But I'm 100 per cent behind them as I feel they're 100 per cent behind me and therefore I want to get this straight: there's nothing to report and I'm very happy at Red Bull Racing."

Red Bull boss Christian Horner also insisted that Vettel, who strengthened his championship lead with a fourth successive win in India at the weekend, was going nowhere and had a deal in place with his current team for 2014 already.

"Sebastian Vettel without a shadow of doubt, will be part of the Red Bull Racing team in 2014," he told the BBC. "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.

"I can't think of any driver that wouldn't want a contract with Red Bull at the moment."