Michael Schumacher could decide next month whether to retire from Formula One, according to Ferrari technical director Ross Brawn.
Schumacher's Ferrari contract is up at the end of the season but he is likely to decide his future before then.
"We haven't given him an ultimatum," Brawn told German newspaper Frankfurter Allgemeinen Zeitung.
"But I'm convinced Michael will let Ferrari know his decision between now and June, maybe even as early as May."
There has been plenty of speculation about whether Schumacher will choose to extend his career at Ferrari, switch teams or call it a day.
Renault boss Flavio Briatore has reportedly already made it known that he wants to sign Schumacher, with whom he worked at Benetton in the 1990s, as a replacement for Fernando Alonso, who is joining McLaren in 2007.
Schumacher, 37, is also understood to be frustrated by Ferrari's lack of success since he won his seventh world title in 2004.
He lies fourth in the drivers' standings ahead of Sunday's San Marino Grand Prix, but Brawn insists Schumacher is ambitious and fit enough to add to the five titles he has won with the Italian team.
"He wants to drive a car which wins races and it's up to us to provide him with one," said Brawn.
"I think we have now found the solution to a lot of our problems."