Mercedes’ two team bosses are refusing to celebrate the 2017 title yet. With just four races to go, Lewis Hamilton now has a commanding 59 point lead in the world championship over Ferrari’s Sebastian Vettel.
But team boss Toto Wolff told Sport Bild: “Something is certain only when it cannot be another way. This year we have seen one of the toughest world championships in a long time, and now we have to keep doing everything to make the season a success for us,” he added.
Making Wolff particularly nervous is the unpredictable performance of Mercedes’ 2017 car, and the sort of reliability problems that have struck Ferrari in recent races.