Ferrari president Luca di Montezemolo says he is 'worried' despite seeing Fernando Alonso become the first double winner of the 2012 F1 season in Valencia.

Alonso came from eleventh on the grid to take victory in the European Grand Prix to secure a 20 point championship lead, although his drive to victory was aided by alternator failure that put Sebastian Vettel out of a race that he had dominated to that point.

Although understandably pleased to have seen his man take his second victory of the season, di Montezemolo said Ferrari couldn't afford to become complacent with the pace of Red Bull giving him cause for concern.

"I am worried and all of us should be," he told Ferrari staff in an address at the team's Maranello base. "Yes, I am worried, because I expect three very tough races at Silverstone, Hockenheim and Budapest and because we have seen that Red Bull is very strong, having had four tenths in hand over everyone in qualifying and in the race it was flying away, at least until the Safety Car. If we want to achieve our goals then we must make a step forward.

"We must ensure we do everything as well as possible because winning depends solely and exclusively on us. It would be a big mistake to think the win in Valencia means we have done enough: today we have a competitive car, but to win, we must do even more."

Taking time to praise the team for the way in which it has remainded in contention for the title despite the problems it has faced with its 2012 car, di Montezemolo also insisted team boss Stefano Domenicali deserved thanks for leading the team through a difficult start to the year.

"The final round of applause and I am the first to put my hands together, is for your boss," he said. "Stefano Domenicali has never shirked his responsibilities, even acting as a lightning conductor for all the criticism, protecting his people, while at the same time knowing how to demand the maximum effort, how to build a team and look to the future in a positive way and with the right sense of realism. He deserves it."