Sutton Images Enlarge Red Bull has labelled Renault's reliability and performance as "unacceptable" after Sebastian Vettel suffered another issue at the Austrian Grand Prix this weekend. Vettel experienced a loss of drive on the second lap of the race, putting him a lap down on the rest of the field even though he was able to continue. Red Bull later retired Vettel after he made contact with Esteban Gutierrez and told Daniel Ricciardo, who finished eighth, not to use his "overtake button" for fear of a similar problem on his car. Red Bull team principal Christian Horner said the amount of reliability issues and lack of performance from its power unit meant something...
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