He may have been linked to 2010 F1 newcomer USF1, but Scott Speed has spoken out to assure that he has no interest in returning to the top flight following his brusque and acrimonious dismissal by Scuderia Toro Rosso two years ago – adamant that 'my future is in America'.

North Carolina-based USF1 was very bold upon its launch that its intention was to promote home-grown talent, and as the only American driver to have competed this side of the Pond since Michael Andretti all the way back in 1993, Speed's name naturally entered the reckoning.

However, the Californian's one-and-a-half year tenure at the Red Bull 'junior' outfit ended abruptly following a souring of relations with team principal Franz Tost – who was reported to have aggressively pinned Speed up against the pit wall following the European Grand Prix at the Nürburgring in mid-summer.

The 26-year-old would not sit in an STR cockpit again – and now happily ensconced in the NASCAR Sprint Cup Series and Nationwide Series with Red Bull's continued backing, he insists that he has no desire to return to the paddock where he got his fingers so badly burned.

“I hardly even follow F1 anymore,” Speed told Dutch website formule.nl, whilst acknowledging that he is pleased to see Red Bull enjoying such a successful 2009 campaign at the highest level and his former team-mate Vitantonio Liuzzi back on the grand prix grid with Force India.

“My future is in America. I have an extremely good relationship with Red Bull, and it's never been any different. I am very happy with what the company has done for me, and I will remain always loyal to them.”