Ferrari team principal Stefano Domenicali has urged the team to be cautious after a solid start to pre-season testing.

While Red Bull struggled, Ferrari completed 251 laps - the second highest total of all the teams - and Kimi Raikkonen set the fifth fastest time of the week at Jerez. However, despite the encouraging first test, Domenicali says the situation could look very different by the end of the two tests in Bahrain.

"I am always cautious, not through a fear of saying what I think, but because I am well aware how quickly things change in this sport," Domenicali told the official Ferrari website. "In Jerez, we saw the F14 T get off on the right foot, responding well to changes, while the basic data corresponds to the parameters established in the wind tunnel and there were no bad surprises.

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"Clearly there is still much to do because it's impossible to start with a perfect car in a season featuring so many changes. The start of the championship will be full of unknown quantities and it is far too early to make any sort of prediction. I think we will start to understand a bit more only at the last Bahrain test."

Domenicali also said that he is confident Ferrari is in a strong position heading in to the second test at Bahrain, mainly because the team is clear in where it has to develop the car.

"My optimism is based on the fact we know which areas need working on: caution is always a good approach, but that doesn't mean the people working on this project lack the commitment or the will to show our competitors how well we can do things at Ferrari.

"I have to say that what pleased me the most was the attitude of the team. Everyone is united in tackling the problems and in trying to resolve them, aware that the challenge ahead is both demanding and exciting."