Last year tyre management over race stints was a major weakness for Ferrari, with a lack of consistency across stints and from set to set.
The SF-24 has been competitive over long runs at the first four events of the season, with Carlos Sainz winning in Australia and the team making the podium in the other three races.
However, Vasseur still wants to see how the car performs at other venues and in cooler conditions after hot weather dominated the early events of the season.
“I think from the beginning of the season we are much better on the tyre management,” he said after the Suzuka race.
“And degradation – I think we were able to do the fastest lap in Jeddah and Melbourne on the last lap. It was almost the case today for one-tenth, I think.
“We did a very good step forward on this one, we worked a lot on the weaknesses, and we improved massively on the tyre management, drivers, strategy, and the team.
“And yeah, now we have some other weaknesses, and we have to improve somewhere else if we want to do a better job.
Source: Autosport