Red Bull changed its power unit as a precaution on the second day of pre-season testing, but the team is aiming to avoid power unit penalties this year.
Sebastian Vettel suspects it wouldn't be easy for Ferrari to copy Mercedes' Dual Axis Steering system, but doubts the device will be a "ticket to win" this year.
Alfa Romeo became the second team to beat their 2020 testing time, while Renault are the only team to have covered less than 1,000 kilometres.
Sergio Perez says Racing Point is better prepared than ever before for the first race of the year having been "late" with their new car in previous seasons.
Kimi Raikkonen was quickest on day two of testing but also caused the first red flag of the week when his Alfa Romeo came to a stop.
Mercedes' 'DAS' system appears to be legal based on the information the team has supplied, the FIA has told RaceFans after the steering device was spotted.
Red Bull's chief technical officer Adrian Newey is already hard at work on their car for the 2021 F1 season, according to team principal Christian Horner.
Mercedes have no concerns over the legality of the new steering system, which they call 'DAS', and say the FIA is already aware of it.
Sergio Perez went even quicker in the Racing Point as day two of testing began, while Mercedes' new steering wheel system became a focus of attention.
Racing Point technical director Andrew Green says his team would "never contemplate" the exchange of staff and information which he says goes on at rival teams.
Racing Point technical director Andrew Green says the team's new car reflects its decision to follow Mercedes' design principles and is a "very big risk" for the team.
Formula 1's Fan Festival in South Africa will take place on March 29th, the promoters have confirmed, featuring Mercedes, Renault, Red Bull and Ferrari cars.
Pictures from the second day of testing for the 2020 F1 season at the Circuit de Catalunya. This gallery will be updated throughout the day.
Esteban Ocon was encouraged by his first run in the "well-born" new Renault RS20 and says he fits well in the car despite his height.
Join us to follow day two of testing for the 2020 F1 season on RaceFans Live.
Fitting the Chinese Grand Prix into the end F1 calendar will be difficult even the threat from the Covid-19 coronavirus recedes, say teams.
In the round-up: "I was flat through turn nine from lap two" - Magnussen • NASCAR's Newman released from hospital • Toyota considering WEC future after Aston Martin exit
Less than two hours after the first test of 2020 began, Racing Point's new RP20 beat the best time the team set in the whole of last year's pre-season test.