Rubens Barrichello has admitted it is not a foregone conclusion that he will stay at Williams next year.
The Brazilian veteran recently admitted he would like to see in his fortieth birthday next year with a third consecutive season at the famous British team.
He is also buoyed with news of Williams' engine supplier switch from Cosworth to Renault for 2012 and beyond.
"It's good to have a powerful engine behind you and I'm convinced that with Renault we will take a quantum leap," Barrichello is quoted by Tuttosport.
"But the team needs to show their interest just as I am showing mine, and then we can agree.
I do not exclude the prospect of switching to another team
"I do not exclude the prospect of switching to another team, if Williams doesn't offer me a reasonable solution. But it's not a priority," he insisted.
Barrichello has contested more than 300 Grands Prix, and 2012 would be his nineteenth consecutively in F1.
"If there are other people willing to have me next year, and Williams do not want me to continue with them, then yes, I would look elsewhere," he admitted.