Ferrari team principal Mattia Binotto has admitted one of his drivers wasn’t comfortable with his 2019 challenger at the start of the season.
Binotto spoke about Sebastian Vettel, who struggled with braking instability in particular.
"He has been uncomfortable with the car at the start of the season, certainly with the braking instability," Binotto told Autosport.
"I think the challenge [of Leclerc] for him has been a good benchmark as well because having such a fast team-mate gave him some headaches.
"In order to improve himself, he's always very analytic. He approaches the exercise, he's not emotional in that respect, he's looking at the data, to compare the sectors, looking where he's eventually slower or faster."
Source-
GP Blog