Apr.8 (GMM) Renault has told its rookie Russian driver Vitaly Petrov to lose some weight.

The German publication Auto Motor und Sport said the 25-year-old newcomer, who is bringing EUR15 million to the team in 2010, is significantly heavier than his teammate Robert Kubica.

Kubica and Petrov, both among F1's tallest drivers, are roughly the same height, but the report said Petrov weighs 10 kilograms more than the slight Pole.

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