Kimi Raikkonen left the Shanghai International Circuit in high spirits on Friday after a day without any major problems for Ferrari.
Fresh from victory at the Malaysian Grand Prix through Sebastian Vettel, Ferrari went a long way to prove that their Sepang win was no fluke as they kept up with pacesetters Mercedes during the two practice sessions.
Although Lewis Hamilton topped the timesheets in both runs, Raikkonen and Vettel were right up there in terms of longer runs.
"Overall it has been a good day of work," the Finn, who was second fastest in FP2, said. "In the afternoon we had a problem with the brakes but the mechanics did a very good job and managed to fix it, then I was able to go back on track and go on with the programme.
"It's a bit early to make predictions, we still have things to improve, tomorrow we have to make sure that everything works and have another good day without any issues or problems and then we'll do our best for qualifying and the race."