Ferrari have narrowed their choice for Fernando Alonso's team-mate next year down to three drivers.
The team's intention is to retain current driver Felipe Massa, but Force India drivers Nico Hulkenberg and Paul di Resta are options.
Massa has reignited his chances of keeping the seat with some strong performances in recent races.
But the team want to wait until at least mid October after the Korean Grand Prix before deciding.
Both German Hulkenberg and Scot di Resta have produced impressive performances this season.
In mid-summer, Ferrari were planning to drop Massa, who has been racing for the Scuderia since 2006.
But the Brazilian has put himself back in the picture with a series of strong drives since the end of F1's summer break, as well as a general upturn in his performances after a poor start to the season.
In the last month, Massa has finished fifth in Belgium, fourth in Italy and produced a strong comeback drive in Singapore to finish eighth after a first-lap puncture put him to the back of the field.
He is currently eighth in the overall driver standings.
BBC Sport understands that Ferrari team members want to keep Massa - as does Alonso, who made his views clear with a comment at the Singapore Grand Prix.
Alonso said: "In my opinion we need to have a driver that respect Ferrari and the tradition of this team and that we work for the team and the red cars. This is the first priority.
"And second I have been working with Felipe three years now and [we have] a good relationship. If the team decide to change Felipe, whoever [comes in] has to be better than Felipe.
"And of the names that have been written I don't know if they have been written with the head or the heart. I don't know if you [can] compare what Felipe did in F1 with what they didâ¦"
That last remark is a reference to the fact that Massa has won 11 grands prix and narrowly missed out on the world title in 2008, whereas none of the drivers who have been linked with replacing him have yet won a race.
But Ferrari's bosses want to wait a little longer before confirming Massa to be sure he can hold on to his current form.
Meanwhile, the picture is complicated by a source with good knowledge of the driver market saying that a deal for Hulkenberg to join Ferrari next year is already done.