Antonio Giovinazzi says Ferrari's SF71-H has improved "dramatically" since the Scuderia's junior driver last tested the car in Barcelona back in May.
The Italian set a blistering pace on the first day of Formula 1's in-season test at the Hungaroring, clocking in with a 1m15.648 that represented a new unofficial lap record.
"I had tried the car in the Barcelona test, and I must say it has improved dramatically,” said the 24-year-old Ferrari development driver.
"It’s a big step, last time was in May and now we’re in the end of July. It’s really good to see this improvement from the car.
"It showed the team and drivers are doing a fantastic job to improve the car."
Giovinazzi quickly set a benchmark time and improved throughout the session, achieving his fastest lap on Pirelli's hypersoft tyres.
"My main programme, we did a few long runs in the morning and a quali run in the afternoon," he added.
"The rain was coming and we delayed the end of the programme with a lot of long runs.
“It was a good day, positive for me and for the team and this is really important."
Giovinazzi will switch over to Sauber for Wednesday's second test day.
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
A familiar storyline may be about to unfold in Formula 1 – one where McLaren…
Momentum is building inside the Haas F1 Team, and much of it is surging from…
Legendary karting coach and talent scout Dino Chiesa has drawn striking parallels between Lewis Hamilton…
F1 world championship leader Kimi Antonelli made good use of his easter weekend to make…
Fresh uncertainty appears to be brewing inside Red Bull Racing, with reports suggesting one of…
Three races into Ferrari’s 2026 campaign, Lewis Hamilton looks rejuvenated – his voice steadier, his…