Class act Hamilton more complete than ever - Wolff

Lewis Hamilton will retain his world title if he wins the United States Grand Prix and Sebastian Vettel fails to finish second.

Toto Wolff (L) and Lewis Hamilton of Mercedes   -  Bongarts

Toto Wolff said "class act" Lewis Hamilton is "more complete than ever" as he closes in on a fifth Formula One world title.

Hamilton will match the great Juan Manuel Fangio's tally of F1 titles if he wins the United States Grand Prix on Sunday and Sebastian Vettel fails to finish second.

The Brit has won six out of the last seven races to stand on the brink of retaining his crown.

Mercedes boss Wolff paid tribute to the 33-year-old, who became only the second driver to win 50 races for one team when he took the chequered flag at the Japanese Grand Prix last time out.

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"With six race victories in the last seven races, Lewis has shown what a class act he is," said Wolff.

"Both on and off the track he is more complete than ever before, showing commanding performance in the car and challenging the entire team to perform to higher levels at the same time.

"Valtteri [Bottas] had some tough races in the summer, but came back strong in recent weeks. He was competitive in both Sochi and Suzuka and embodied our team spirit.

"We're lucky to have this driver line-up and we know can count on them as the season comes to its close."

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