Rubens Barrichello on Thursday sounded reluctant to sign up for a third season at Williams in 2012.
The famous British team has had its worst start to a new championship in its illustrious history, prompting technical director Sam Michael and chief aerodynamicist Jon Tomlinson to lose their posts for next year.
And Barrichello, the most experienced driver in F1 history, told the British magazine Autosport that he could be the next high profile departure.
"Williams must improve a lot for us to reach an agreement for next year," he said.
"Things are standing still. It's not worth going on this way. I need the team to start to shake up and I need to see differences," insisted the 38-year-old.