Sebastian Vettel has blamed excessive oversteer for his early season struggles with the Red Bull RB10.The reigning World Champion has been out-qualified at three of the opening four races by new team-mate Daniel Ricciardo and to rub further salt into the wounds, the German was ordered to let the Australian past at both the Bahrain and Chinese GPs. Whilst the RB10 is not as dominant as its RB9 predecessor, it is clear that Vettel has been extracting less from the car than Ricciardo as he struggles with stability at the rear suggesting the ban on exhaust blown diffusers - something Red Bull had mastered compared to Toro Rosso - could be a key factor. "I think generally we have our own...
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