"Following some medical checks, Fred will remain under observation at a local medical facility. No further medical information will be provided," the Italian team said.
Ferrari have high hopes of a first Grand Prix win since October 2024 with the twisty Monaco street circuit expected to narrow the performance gap with the dominant Mercedes team.
Drivers Lewis Hamilton and Charles Leclerc finished first and second in both practice sessions on Friday.
Frenchman Vasseur, 58, moved to Ferrari in 2023 after six seasons at the former Sauber then Alfa Romeo team.
-Reuters








