Ferrari driver Kimi Raikkonen insisted he is not worried about the reliability shown by Mercedes at this week's Formula One testing in Barcelona.
Mercedes completed a total of 675 laps over the four days at the Circuit de Barcelona-Catalunya, 228 more than next-best Torro Rosso.
Ferrari ran 353 laps around the Spanish track, a whole 322 behind last year's constructors' winners.
However, when asked if he was concerned about Mercedes' form, the Finn quickly played it down.
"Why should I be worried? It's something that a lot of people do," he told reporters.
"We do our own stuff. Obviously we would have liked to have a bit more laps as I lost a day out of two, but that's a part of testing.
"We are getting ready for the races and if there's some issues or things to try, we do it here."
Raikkonen topped the timesheets on Thursday, with Ferrari setting the pace on three out the four days of the pre-season test.
The 2007 world champion added: "To get the first feeling of the car and I am sure that there is a lot of potential.
"It feels better than last year's package, and that was the aim. It is very early days, and we have not done a lot of set-up work with it.
"For sure we can improve it, so we are just doing the normal work."