Pizzonia expecting quick decision on '07.

Antonio Pizzonia admits that he could be facing a tough choice when it comes to deciding where to race next season, having topped the time sin the most recent day of GP2 Series testing at Jerez.

The Brazilian has been chasing a Champ Car ride for much of the season, but opted to try his hand at GP2 during the post-season tests at Paul Ricard and Jerez with a view to possibly following fellow F1 refugees Gianmaria Bruni and Giorgio Pantano in taking a step back to help rejuvenate his career. Topping the times in Spain confirmed his pace from earlier sessions, all of which have been conducted with Giancarlo Fisichella's FMS International operation, but Pizzonia admits that he could still be tempted back to the USA.

"Obviously, there is a possibility to race here for the next year," he confirmed of GP2, "That is one idea but, on the other hand, there is Champ Car, which is a totally different thing.

"I think the decision will be made soon, in the next week or ten days. Whatever I do, obviously I want to have a chance to win races and, hopefully, the championship. If I think GP2 is the place I can win the championship, then I will stay here, but, if I think that Champ Car with Rocketsports or another team is where I can win, then I'll look at that.

"There are a lot of different things to think about. If I go to America then, obviously, it will be for a long time and I will build my future there. If I stay here, then it will be to look for an opportunity in Formula One. I think it's going to be a difficult decision and, at the moment, I really don't know what I'm doing next year. Hopefully, I will make the best decision."

Pizzonia makes no secret about having enjoyed his time in the GP2 car, where he stepped into Pantano's race-winning seat alongside Jason Tahinci at FMS. After two two-day outings at Ricard, he moved to the top of the times at Jerez, pushing expected pacesetters Franck Perera and Pantano back into second and third.

"We did some set up work this morning to try and improve the car, mainly on new tyres, and we were looking quite good already, but you have one lap on the new tyres then that's it, and I had one lap with a red flag and another with traffic, so we lost our best laps," he noted, "But I think the pace was already there, so we did another 20-25 laps to try and work on the car for the new sets and, then in the afternoon, we did two short runs, the first one on old tyres and the second one on new tyres, and it was good."

Tyres were a large factor in getting used to the performance of the GP2 car, the Brazilian noted.

"The tyres don't really last that much - it was probably only the first lap that is pretty good and then there is a drop off for the next three or four laps, and then after that they're gone, so after that it is really freaky to judge where you can use the tyres because the balance changes completely," he said, "Basically, the rear ones are the worst. The front grip is always there, but the rears don't last very long, so it's pretty tricky to set the car up, because you do a lot of work on the old tyres and then, with the new tyres, the balance is really different, and you never know what to expect."