Fernando Alonso has urged caution about Ferrari's F1 form despite the Italian squad dominating the first test of the year at Valencia this week.
The two-time champion joined the test today, taking over team-mate Felipe Massa at the wheel of the F10 car, after the Brazilian had topped the times on the previous two days.
Alonso was quick to find the pace with the car and ended up setting the fastest time of the week.
But despite Ferrari being quickest of all teams during the week, the Spaniard says it's still too early to judge the car's performance.
"It's just the first day and as I said now at least for me the priority was getting completely comfortable. There are many things to discover for me, many things to learn," said Alonso.
"Before being competitive we need to make sure we do a lot of laps and that the car is strong and can finish all the grands prix. We are at that period of winter testing.
"We need to make the car very strong and until Barcelona or the last test at Jerez I think we will not look for the performance."
The two-time champion admitted his first day as a Ferrari driver was emotional - especially as an estimated 40,000 fans turned out to watch him.
"It was an important day for me, my first time in a Ferrari," he said. "As I repeat many times, it's unbelievable the feeling here, the atmosphere, the passion of everybody. It's very nice to be in the garage, to speak Italian with all the mechanics."