Pirelli has warned that it will struggle to provide tyres for the 2014 F1 season unless it is given permission to carry out more winter testing ahead of the new campaign.

The Italian company has a deal in place to continue as the sole supplier to the grid next year but faces a fresh challenge as it seeks to provide a tyre suitable for the new regulations that will come into force in 2014, when the sport will switch to 1.6 litre turbo-charged engines.

The switch to turbo engines and the additional torque produced will put extra pressure on the tyres, with Pirelli keen to try and avoid a repeat of the problems encountered this year.

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As things stand, Pirelli looks set to only be able to run its 2014 tyre when testing gets underway at Jerez for the first official test of the year and motorsport director Paul Hembery warned that that was too late.

"Based on the comments of our chairman a few weeks ago then there has to be some running or we can't do the tyres," he said. "[Talks are] still ongoing but we have to do some testing. We don't need a lot because we are changing some of the concepts. The structure we are not so worried about but in terms of the compounds there are a few conceptual changes we have to trial out, ideally on a 2014 car as soon as possible. But all the teams are struggling to get ready for Jerez, so that's not going to happen.

"We just want the best of the best. We'd like some common sense. We have to do some testing if we can, otherwise we won't be able to provide the tyres next year."

Hembery added that, while not ideal, Pirelli would be prepared to use a 2013 car for some winter testing in order to gain additional information ahead of the first pre-season tests.

"You can get relative levels of data but you won't get absolute levels," he said. "Taking the conceptual work, you've got a choice of learning nothing if you don't run or something if you do run. That's the only way I can say it.

"Clearly, we would love to have a 2014 car in December, that's what we really need. But with the timing of the winter tests in Bahrain and Jerez ... if we had a month and a half between Bahrain and the first race we could do it that way. But we don't have that luxury, unfortunately."