Mercedes F1 boss Toto Wolff and Daimler chief Ola Kallenius are reportedly at loggerheads over who will succeed Lewis Hamilton.Seven-times Formula One champion Hamilton ended speculation over his immediate future on Monday by signing a one-year deal to remain with the Silver Arrows.The short duration of his new contract has sparked talk of who will replace him at the marque - with Max Verstappen and George Russell both touted as potential successors.Russell appears destined to join Mercedes after the Williams driver impressed while standing in for Hamilton at the Sakhir Grand Prix in December.The 22-year-old qualified second for the race and would have won it had it not been for a botched pit-stop.Mercedes chief Wolff is reported to be keen.
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