Ferrari have revealed that they are worried about the pace shown by Sebastien Vettel before the German's retirement at the European Grand Prix.
Ferrari's Fernando Alonso took the checquered flag in Valencia, but Vettel took pole by more than three-hundredths of a second and was lapping a second faster than his rivals.
Stefano Domenicali, Ferrari team boss, believes that Red Bull are the current team to watch and his own team have work to do. "They did something very good this weekend; they improved the car," he said.
"We cannot be happy because we are not there at the moment. We need to keep our feet on the ground but this is a very different car from where we started the season."
Alonso is the only driver to have won two grands prix this season.
