Tonio Liuzzi says he would relish a return to F1 although wouldn't necessarily be open to replacing another driver mid-season.
The Italian was left without a race-seat for this year's Championship after HRT opted instead to sign Pedro de la Rosa and Narain Karthikeyan. Liuzzi remains part of the team as their third driver.
But what he really wants is to race in Formula One again.
"Of course I miss Formula One because it is the pinnacle of the sport and the ultimate goal in a racing driver's career," the Italian told Touring Car Times.
"For sure I would like to try to get back there in the future. On the other hand I'm really happy to be here, this is another chapter in my career and I'm glad I had the opportunity to prove myself in a high level Championship as the Superstars Series.
"If I had the chance to go back to F1 midway through the season I would need to evaluate the situation very carefully.
"Of course I'm still linked to the grand prix world as a third driver for HRT and it has a priority for me, so if the opportunity comes I would have to think about it and you never know what's going to happen in the future."