Toto Wolff has urged second Mercedes driver Valtteri Bottas to become more of an F1 “killer”.

After winning his fourth world championship, Lewis Hamilton is being hailed by his Mercedes chiefs.

“It’s been rock and roll with Lewis all year round,” team boss Wolff is quoted by Dutch source Formule 1.

To La Gazzetta dello Sport, team chairman Niki Lauda agrees: “Our car was not the best this year.

“In the last three years, our advantage would even have made me world champion. But with the strong Ferrari this year it must be said that Lewis gave us the title and not the other way around,” he added.

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