Charles Leclerc took Ferrari's first pole of the season in last weekend's Azerbaijan Grand Prix but in the race he was powerless to keep the much faster Sergio Perez and Max Verstappen behind as Ferrari was soon resigned to tyre saving.
Leclerc gave Ferrari a much-needed first podium in third behind the two Red Bull drivers, but his 21-second deficit showed the Scuderia still has a lot of ground to make up in race trim.
According to team principal Vasseur, the team's upgrade programme will bear its first fruits in this weekend's Miami Grand Prix, with further smaller updates planned for the following European races.
"We will start to bring updates on the car from Miami and for the next couple of events and we will see how the car will react to the updates," he said.
"The update is one thing but the fact that you are able to extract all of the potential out of the update is another one."
Vasseur wouldn't want to be drawn on whether Ferrari's deficit is purely mechanical or if there is an aerodynamic component to it. And while he reckoned Ferrari "shouldn't bullshit" itself over its form, he did feel the car's more consistent behaviour was a step in the right direction.
"Overall, they were faster than us and we don’t have to bullshit ourselves,' he said. "Then to understand if it is coming from aero or mechanical is another story.
"I think so far what is obvious is that we are struggling with consistency. It's true this weekend, all over the lap, all over the corners and all over the race. [But] I think the car was much more consistent this weekend and we are going in the right direction."
Source: Autosport