May 30 (GMM) Sergio Perez is refusing to rule out a change of teams.
The Mexican, however, has insisted that he is not about to switch to Ferrari during the 2012 season, despite strong speculation he is first in line for Felipe Massa's seat.
As for 2013, the door is open.
"In Malaysia," he told Germany's Auto Bild, "I lost the victory more than I won second place.
"If I could do that race again, I would win it," insisted Perez.
Once seen as a 'pay driver', Perez is now regarded as a potential winner with key connections; not only to Mexican billionaire Carlos Slim but as the cream of Ferrari's development programme.
"There is a point in your career when you feel ready to fight against the best drivers in the best team. For me, this is the next logical step.
"I feel very comfortable here (Sauber), but I want to win races as soon as possible," he said.
And Perez admitted that Slim will play a role.
"We decide together what I do. I told him I would like to talk to him a little later in the season about my future and what options I have," he added.