Felipe Massa will be a wild card in the Bahrain GP as he starts from fourth place with the hard prime tyre.
Massa qualified sixth, but gained two spots from penalties applied to Lewis Hamilton and Mark Webber.
He said the choice was largely because he felt more comfortable than on the medium.
“I think maybe the preferred tyre is the hard, that’s why people are saving the hard,” he said. “I didn’t save, but I start on the hard, it can be that I gain positions on the first stint because of that, I don’t know, we’ll see.
“The race is definitely long. I was not very happy with the medium as well, struggling a bit on the balance to find the right grip, so that’s why I took this gamble. I think when you start from the fourth position on the hard tyres, it’s not a bad thing to do.
“For sure you are more confident because you start in a good position on the hard tyres, so we need to wait and see if it works or not tomorrow. It can be that it works, so let’s be optimistic and concentrate on the race.”