Pirelli boss Paul Hembery insists that the lack of running for the 2014 tyres taken to Interlagos for the Brazilian Grand Prix will prove to be no major setback ahead of next season.

Teams were set to have the option of trialling the new rubber during Friday practice in Sao Paulo, although rain throughout the day meant that just a single lap was logged on the development tyre.

While far from ideal, Hembery insisted that it was no major disaster for either Pirelli or the teams, with the weather conditions simply being one of those things that can happen in Sao Paulo.

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"It was a tricky start to the weekend here at Interlagos, but the conditions we saw are likely to continue for the rest of the weekend, so it was useful for the teams to establish a wet set-up and assess the performance of the wet and intermediate tyres with different fuel loads," he said.

"It was a pity that the drivers didn't get the chance to try the development tyres as this was an important opportunity: on the other hand, the 2014 tyres are obviously designed for a completely different type of car to what we see competing for the final time this weekend, so there was only a limited amount to learn anyway. In the end the situation was just a bit unlucky, as on the two previous occasions that we brought development tyres to Brazil in 2011 and 2012, conditions remained dry on a Friday."

Talks had taken place to see if the development tyres could be made available to teams for Saturday's final practice session, although such a move was blocked by the FIA.

"Further to the discussion in the team managers meeting yesterday, and having discussed the matter at length with the stewards, I can confirm that in accordance with Article 25.4(b) of the Sporting Regulations the two sets of development tyres provided for use in P1 and P2 today may not be used in P3," a statement from Charlie Whiting read.