Red Bull Team Principal Christian Horner has branded Renault’s level of performance during the Austrian Grand Prix as ‘unacceptable’ after Sebastian Vettel’s race was destroyed by a power unit failure and Daniel Ricciardo slumped to eighth. Vettel, starting 12th, dropped to the rear of the field after an early electrical problem caused his car to grind to a stop, and while the German managed to restart the RB10, he later clashed with Esteban Gutierrez’s Sauber, after which he opted to retire the car. Ricciardo could manage no better than eighth at the chequered flag, after a poor start lost him track position early on, with the Australian struggling to progress owing to the...
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