Kimi Raikkonen has emerged as a threat to Ferrari's title hopes, according to the Italian team.
The Lotus driver moved up to third place in the standings after Monza thanks to his fifth-place finish, and his impressive consistency leaves him just 38 points behind Fernando Alonso in the standings, one point behind Lewis Hamilton.
Ferrari team principal Stefano Domenicali thinks the title battle is wide open, and that Raikkonen is the one to watch out for because he has been performing so well without being under the spotlight.
"I have to respect all of them," said Domenicali when asked about who he felt was Ferrari's biggest threat for the world championship. "I always said Kimi step by step is a dangerous driver, and he is getting closer and closer.
"Hamilton, with the car he has now, is very, very strong and we have seen in the last few races that anything can happen. So all the drivers that are in the top five or six I think need to be taken very seriously.
"We need to see race by race what is the competitive situation of the car that they are driving. That is the only thing we have to do now."
Domenicali also believes that the fight for the constructors' championship has been blown wide open by the double retirement for Red Bull at Monza. The reigning champion team is 19 points ahead of McLaren now, with Ferrari 17 points further adrift.
"I have to say for us that because of the retirement of Red Bull, the constructors' is difficult but still open for the four top teams. So it is another motivating factor for all of us, to make sure we are performing as we can and that is what we will do."