BBC Sport - Sebastian Vettel wants Red Bull improvements

Vettel wants Red Bull improvements

World champion Sebastian Vettel says Red Bull are working harder than ever to ensure they stay ahead of Ferrari and McLaren after victories for Fernando Alonso and Lewis Hamilton in the last two races.

In last weekend's German Grand Prix, Vettel failed to finish on the podium for the first time this season as Hamilton took top spot, while Alonso scored maximum points in the previous race at Silverstone.

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