Rubens Barrichello has revealed he is still "waiting" to know if he will race a twentieth consecutive Formula One season in 2012.
The British team has already confirmed the well-backed Pastor Maldonado for next season but is looking at its options for the other seat, which has been occupied by Brazilian veteran Barrichello for the past two years.
It emerged just before Christmas that Bruno Senna visited Williams' Oxfordshire base, amid rumours Adrian Sutil is perhaps the favourite for the second race seat.
"Just came back from England," Barrichello, 39, said on Twitter two days before Christmas.
"Now some holidays," he added, "and waiting for good news from Williams."
I really want to do twenty years in Formula One
F1's longest-serving driver Barrichello, with a whopping 326 Grand Prix weekends behind him, also told Brazil's Totalrace: "I have no plans to stop.
"I really want to do twenty years in Formula One. Who knows whether a great team will have me and this thing will go on.
"The passion and the desire are still there, now for the rest but one way or another, I will be competing," he added.