– Red Bull team boss Christian Horner has warned that Sebastian Vettel should make a "big step" when he gets on top of his early-season car issues. The German has struggled to adapt to the sport's new technical regulations, with stability under braking and corner entry particularly troublesome areas. But Horner reckons Vettel, who is running with a different chassis at this weekend's Spanish Grand Prix, has what it takes to turn it around. Horner also made reference to the 2012 campaign, when Vettel struggled early on but overcame his problems to notch up the World Championship. "He hasn't found his set-up that he wants yet, because we had such limited time...
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