Felipe Massa is sure that his change of chassis for this weekend's Malaysian Grand Prix will help him recover from his poor start to the season in Australia.
The Brazilian's future at Ferrari came under the spotlight again after he suffered a tough weekend in Australia, qualifying only 16th and racing in the midfield until retiring after a collision with Bruno Senna.
Ferrari has given Massa a new chassis for this weekend in a bid to get him comfortable with the F2012, and he says that he is more concerned with the performance of his car than doubts over his future.
"The only thing I care about is the car," he said on Thursday. "To have the car I know [from testing], not the one I had in Australia. [Changing chassis] is the right thing to do.
"I really don't care [about criticism in the media], I have a job. The only thing I am working for is to drive the car and get out of the car 100 per cent convinced that I did the best."
Massa explained that the difference between his car last weekend and in testing was huge.
"Every time I drove the car in testing I never had a problem like I had in Australia," he said. "Every day, and the day after with Fernando in the car, there was never anything strange or different.
"And then you arrive in Australia and see that everything is different. It was the main discussion this week, to improve the situation and to find out what has happened. I'm sure we are fine."
He also praised the efforts of his Ferrari team and the lengths that it has gone to ahead of Malaysia to eradicate any problems with his car.
"We didn't just change the chassis, we changed everything," he added. "We didn't understand, so that is why we change everything.
"The team is very professional, taking away what is not working and improving the performance is good for me and very good for them. I am sure this is the solution to give the best the car can give."