Helmut Marko believes it will be a real duel between Mercedes and Red Bull Racing in 2021. Other contenders such as Ferrari and Aston Martin are not considered fast enough by the 77-year-old advisor to the Austrians, although Marko knows that both teams will have made good progress. Marko reiterates that he doesn't expect much competition from Aston Martin. "I don't think you can make up for that in one season. It's also about the infrastructure in the team. For a world championship everything has to be right - the pit stops, the further development. I don't see Aston Martin getting that far yet." Read more Perez faces big challenge at Red Bull: 'Verstappen is the fastest in F1'...
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