Valtteri Bottas topped the morning session of the first test day at Barcelona in his Mercedes, setting a best time of 1m17.313s.
Bottas had a relatively trouble free morning in his Mercedes, completing 78 laps, and he topped the timesheet in the final hour of the four hour session, ahead of the Racing Point of Sergio Perez.
The new Racing Point looks very similar to the Mercedes this year and Perez had a strong morning, setting a best time of 1m17.375s on the medium C3 tyres as he completed just over half a race distance.
Max Verstappen was third fastest in his new Red Bull RB16, 0.412s behind Perez, and it was a productive morning for the 22-year-old as he racked up 91 laps, more than any driver other driver in the session.
Carlos Sainz got some decent running in his McLaren, circulating the Catalunya circuit 64 times, and he finished the morning session fourth fastest, while Esteban Ocon got his first taste of his new Renault, having spent a year on the sidelines.
With the Renault finally showing off its new 2020 design in an all black livery, Ocon completed 59 laps, setting a best time of 1m8.004s to end the morning fifth fastest.
George Russell had a much better start to pre-season testing this year than compared to a year ago, and set the sixth fastest time of 1m18.168s in his Williams.
That time was nearly a full second faster than his time in qualifying at Barcelona last season, suggesting the Grove-based team have found significant improvements for 2020.
Ferrari had a late switch with drivers after Sebastian Vettel reported that he was unwell and Charles Leclerc stepped in.
Leclerc was seventh fastest, with a best time of 1m18.289s, with the team looking like they were focusing on long runs, and the Monegasque driver completed 64 laps.
Robert Kubica was eighth fastest for Alfa Romeo, while Kevin Magnussen was ninth fastest in his Haas with a best time of 1m18.466s after racking up 52 laps.
Daniil Kvyat was at the bottom of the timesheet, just 0.018s behind Magnussen, as he completed 53 laps in his newly named AlphaTauri.
Day 1 Test – Morning session results
|Sergio Perez||Racing Point||+0.062|
|Max Verstappen||Red Bull||+0.474|
|Robert Kubica||Alfa Romeo||+1.073|