Sebastian Vettel has said that he remains patient as Ferrari build back up to winning form.

Before the summer break, Red Bull overtook Ferrari as the second-fastest team behind Mercedes, just as news was confirmed that technical boss James Allison had left.

"We have a lot of good people," Kimi Raikkonen said at Spa. "That's not our problem. We just have to work harder."

Indeed, Ferrari took a new specification of engine to the Belgian Grand Prix, but Auto Motor und Sport says that it will not be actually used until Monza next week.

The Italian team does have a new bodywork package at Spa, though, but F1 pundit Marc Surer doubts that it will be enough.

"Ferrari has been developing all year," he told the German broadcaster Sky, "but unfortunately the car hasn't got faster.

"Ferrari and Vettel will only win this year with luck."

Luckily for Ferrari, German Vettel says that he is patient.

"In Formula 1, some changes happen quickly but sometimes things can take longer," he said.

"There were four weeks off but in reality we only had one and a half weeks to respond to Hockenheim.

"What we learned will make a little difference here, but we will see more at the races after that."

Ferrari sit 14 points behind second-placed Red Bull heading into the weekend.