David Coulthard thinks it is possible Ferrari will soon oust Felipe Massa.
Despite Brazilian Massa having a contract for 2012, recent speculation has linked the race seat alongside Fernando Alonso next year with Mercedes' Nico Rosberg.
"In Formula One, anything's possible," said former Grand Prix winner and now British pundit Coulthard, appearing on Austrian television Servus TV.
"I've learned that in my 17 years (in F1)," he added.
Coulthard said that when it comes to one of the most coveted seats in the sport, only performance matters.
"He's a very nice, likeable guy who drives with his heart," said the Scot. "But he no longer shows the sort of performance he did before his accident in Hungary (2009).
"Ferrari probably have no choice but to look for another driver."
Coulthard agreed that, in India last weekend where Massa clashed again with Lewis Hamilton and twice broke his suspension over kerbs, the 30-year-old seemed to be buckling under the pressure of his situation.
He no longer shows the sort of performance he did before his accident in Hungary
"In Formula One you're always under pressure," he insisted.
"Even Sebastian Vettel is under pressure, just a different sort. Massa may know that his Formula One career is slowly coming to an end. With these results, he will not be at Ferrari for many more years.
"Ferrari will be looking seriously at the two drivers it has and deciding what is the strongest possible package they can have for 2012," added Coulthard.