BBC Sport - Red Bull need to make another step forward - Vettel

Red Bull need more - Vettel

World Champion Sebastian Vettel says Red Bull "need to make another step" after failing to top the timesheets in Friday practice ahead of the Brazilian Grand Prix.

Vettel reveals "it would be great" to finish his season with another win, potentially his twelfth of the season, but reveals he struggled for grip on the "slippery circuit" at Interlagos.

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