George Russell: Toto Wolff rejects Helmut Marko's doubts over Mercedes driver's future hopes as Kimi Antonelli nears title

Former Red Bull chief Helmut Marko has cast doubt over George Russells hopes of becoming F1 world champion in the future; Toto Wolff says the Brit has what is required to win a title; watch every session of the Mexico City GP from this Friday, live on Sky Sports