Pirelli give 2014 safety assurance after Rosberg failure

Formula One tyre suppliers Pirelli say the safety of next year's tyres is not in doubt after Mercedes' Nico Rosberg suffered a high-speed failure while testing in Bahrain on Thursday. Rosberg's car was fitted with a prototype tyre which will not be used again. Four teams - Mercedes, Red Bull, Ferrari, and Toro Rosso - have carried out three days of testing for Pirelli this week in a session specially sanctioned by the FIA

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