Can Perez & Sainz defy their number two status?

New Red Bull signing Sergio Perez and Ferrari newcomer Carlos Sainz are already well-advanced with their preparations for the 2021 season. But can they upset the established order in their respective teams, and what exactly do we mean by number two driver? Mark Hughes and Scott Mitchell join Edd Straw to discuss two of the most intriguing transfers heading into the new campaign.

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