Rosberg warns Mercedes on Antonelli's final hurdle

Rosberg's comparison to his own title-winning season is the detail worth sitting with — it frames Antonelli's situation not as a crisis but as a recognisable developmental phase that elite drivers work through. The concern Mercedes should take seriously is the gap between raw pace and consistent execution under pressure, which is exactly the kind of thing that can quietly cost a team a constructors' fight. Rosberg has lived both sides of that equation at Mercedes, so his read carries more weight than outside commentary. The 'worst-case' framing is a signal that the team's internal expectations may be running ahead of where a rookie realistically sits in his debut season.