Pirelli has admitted that it might not be able to introduce a new construction of tyre this year.

The Italian marque is seeking the agreement of all the teams to bring in a safer construction, but some competitors fear that it is fundamentally different and slower.

As a last resort, Pirelli could turn to the FIA for help on getting the tyres introduced on safety grounds.

"But I would prefer to get the consent of all of the teams," Pirelli's Mario Isola told Auto Motor und Sport.

The report said that it is already too late to get the new tyres sent to Malaysia for the race in early October by sea.

"We still have to produce the tyres," Isola admitted, "and then send them to Sepang via air.

"The normal tyres are already on the way by sea. If we get an agreement on the new tyres, we will just have a lot of tyres in Malaysia."

The championship continues tomorrow with the Italian Grand Prix.