Pirelli has come under fire this year. (Photo: Getty Images)

Pirelli has come under fire this year. (Photo: Getty Images)

Pirelli is investigating the causes of right-rear punctures that afflicted Sebastian Vettel and Fernando Alonso in FP2, and also a series of cuts seen on other Formula One tires.

Pirelli’s Paul Hembery believes that something on the track was the likely cause in most cases, while also suggesting that a piece of debris was responsible for the Vettel problem.

Inevitably, given the events of Silverstone and the high-speed nature of Spa, teams and drivers are looking for some reassurances from Pirelli.

“It looks on the Red Bull as if something has been rubbing on the surface and then cut straight through the surface,” said Hembery. “And on the Ferrari there are two quite clear holes through the top of the tread. We’ve got to go and look at the track later and see what’s been turns 13 and 15.