Mercedes Formula 1 chief Toto Wolff believes it is “dangerous” to assume the high-speed Circuit de Spa-Francorchamps will suit the team’s W08 car at this weekend’s Belgian Grand Prix.

Mercedes has been embroiled in a close battle with Ferrari at the top of the F1 constructors’ championship for much of the season so far, with its lead being reduced to 39 points after the Italian marque scored a one-two finish last time out in Hungary.

Given its strong performances at power-hungary circuits such as Silverstone and Montreal, Mercedes has been tipped to enjoy an edge over Ferrari at Spa, but Wolff is wary of such assertions.

“On paper, people will assume that Spa should suit our car because it is a circuit where aerodynamic efficiency is extremely important,” Wolff said.

“But assumptions are dangerous. We have seen too many times already this season that the form book can be rewritten from one weekend to the next.

“So we will be making no assumptions; we have to tick off the items on our work list and make sure we do the best job to maximise our potential points score. 

“The motivation and determination in the factory are greater than ever. Hungary showed the strength of our team - and we intend to use the second half of this season to prove that strength.”

Wolff expects the advantage between Mercedes and Ferrari to swing back and forth going from circuit to circuit, and would not be surprised to see Red Bull join the fray given its recent strides forward.

“From what we have seen in the first half of the season, the competitive balance will swing one way and another from circuit to circuit. Red Bull will be a threat if they can build on the performance they showed in Hungary,” Wolff said.

“So we need to keep our heads down, stay humble regarding our strengths, diligent about our weaknesses, and take the season weekend by weekend.”