Triple Formula One world champion Max Verstappen set an impressive pace as Red Bull, the dominant team from last year, continued their strong performance on the first day of preseason testing in Bahrain on Wednesday.
Although timesheets can be deceptive due to teams running different programs, it was evident that the new Red Bull car was already showing improvements over last year's RB19.
Verstappen completed 143 laps, equivalent to two race distances and finished 1.140 seconds ahead of his closest competitor, Lando Norris, in the McLaren.
The Dutch driver's best lap of one minute 31.344 seconds under the evening floodlights compared to last year's opening day best of 1:32.837 at the same circuit.
"It feels good to be back in an F1 car again and I had fun out on track today," said Verstappen.
"We covered a lot of laps and tried quite a few things with the car, which was important. I'm so happy overall with how it went.
"After the winter break, the first few laps always surprise you a little, but then you get back into the swing of things pretty quickly."
The sense of business as usual contrasted with the uncertainty surrounding Verstappen's team boss, Christian Horner, who has denied allegations of inappropriate behavior leveled against him by a female employee.
Horner was attending the test at Sakhir.
Verstappen, who won a record 19 of 22 races last season with Red Bull's Sergio Perez winning two more, also topped the morning session in 1:32.548 when he completed 65 laps without any problems.
"We came to Bahrain with a few unknowns around a relatively new car but we have tested most of the fundamentals on day one and got the answers we needed," said his race engineer, Gianpiero Lambiase.
Productive Ferrari
Ferrari's Charles Leclerc was second in the morning, with Fernando Alonso third for Aston Martin and the last driver within a second of Verstappen.
"Our first morning of testing was quite productive, especially in terms of mileage," said Leclerc. "As for the performance, it's just too early to comment or draw conclusions.
"We ran all the tests we planned to, and things are going ahead as expected, which is a positive."
Australian Oscar Piastri lapped fourth fastest in the morning for McLaren, handing over to Norris for the second stint.
Alex Albon of Williams was the first driver to experience any notable problems, stopping his car on track due to a fuel pump problem with 21 minutes remaining of the first session.
Teammate Logan Sargeant had a suspected driveshaft problem, and Williams was the only team not to take their lap tally into three digits.
Mercedes had George Russell in their car, whose new front wing gained plenty of attention all day – completing 122 laps – with seven-times world champion Lewis Hamilton driving on Thursday.
Team boss Toto Wolff said the mood in the team was positive, with Mercedes emphasizing creating a stable platform for development and spending time making changes to the car in the garage.
"We had a filming day yesterday and then some aero running this morning with no relevant lap times," added the Austrian.
"So far, the feedback from the drivers was yes, this is something we can start to work with, and that is encouraging."
Teams have only three days of testing before the season starts in Bahrain next week.