Ferrari will wait for the outcome of Felipe Massa's medical examination in Miami on Monday before deciding on its driver plans for the Italian GP.
Massa is to undergo a check by renowned doctor Steve Olvey, which should provide a clear indication of how long the Brazilian will be out of action for.
Once the team is aware of that verdict, Ferrari will then decide on whether to stick with current replacement Luca Badoer for Monza or put another driver in the car.
Ferrari team principal Stefano Domenicali said: "With regard to what we are going to do for the next races, we will tell you in the next three days.
"We will use all our consideration following the medical check that Felipe will do tomorrow, and then we will put on the table all the different things that are correct and have been considered and then we will make a decision."
Domenicali dismissed reports in the Italian media that Fernando Alonso had agreed a switch deal from Renault, and ruled out the Spaniard as a contender.
Giancarlo Fisichella remains favourite for the drive, especially after his shock second place finish at Spa.
Domenicali also declined to comment on if Kimi Raikkonen's victory had changed the team's driver's plans for 2010, amid speculation that the team is trying to move the Finn aside for next year.
"No one has said anything different from the team point of view," said Domenicali.
"This is a lot of speculation. I really hope that you people keep writing that, because if this is Kimi's reaction then please do it day and night.
"It is important to understand the situation and I don't think it is a point of discussion that we need to start today. That is the answer."