Leclerc overcame a five-place grid penalty for blocking Lando Norris in qualifying to score sixth in his home race last weekend but made the SF-23 out to be “very difficult to drive in traffic”.
Team-mate Carlos Sainz notably tagged Esteban Ocon and ran off at Mirabeau corner on his way to eighth.
Meanwhile, an upgraded floor for the previous Miami round was conceived to make the car more “benign”, reported Ferrari driver coach Jock Clear. Although, Leclerc lost control to hit the wall in Q3.
However, team boss Vasseur reckons the SF-23 cannot be that tricky to drive since Leclerc missed out on pole in Monaco to Red Bull rival Verstappen by only 0.106s before serving his grid penalty.
Speaking to select media, including Autosport/Motorsport.com, Vasseur said: “You have always got to stay calm. If the car was so difficult to drive, I can't imagine that we could be 0.1s off Verstappen.”
He instead reckoned Leclerc and Sainz were going over the top with their venting because they were being quizzed in the immediate aftermath of track sessions, rather than having time to take stock.
He continued: “Sometimes you are jumping on the drivers five minutes after qualifying.
Source: Autosport