Red Bull boss Christian Horner says the team "need both drivers firing on all cylinders" if they are to challenge Mercedes in 2021.
Britain's Jamie Chadwick has been retained by Williams for 2021 and will continue as the team's development driver for a third season.
Taking a look at some of the talking points so far - and what's to come in a busy week - as the wraps come off F1's 2021 contenders.
Carlos Sainz has been backed to succeed at Ferrari but admits it will be a "bit complicated" to beat Charles Leclerc in his first year.
Ferrari believe they have "recovered quite a lot of speed" with their new 2021 car as the F1 giants bid to bounce back from one of their worst seasons.
Lewis Hamilton has asked the question "what's next?" in the fight for equality into 2021 as "change is still needed".
All the latest from the F1 Gossip Column amid car launch season as Formula 1 declines a vaccination offer from Bahrain GP organisers.
Red Bull's new RB16B took to the first track for the first time at Silverstone with Max Verstappen and new signing Sergio Perez.
Liverpool shortlisted in the Team of the Year category in the Laureus World Sports Awards, while Lewis Hamilton is nominated for the World Sportsman of the Year Award.
Silverstone's boss believes vaccine passports could a workable answer for sporting events such as the British GP to run with fans at capacity.
Romain Grosjean said getting back into a racing car cockpit for the first time since his fiery Formula 1 crash "felt like home" after making his IndyCar debut.
Sergio Perez has made his track debut for Red Bull after driving his first laps for the team at Silverstone on Tuesday.
Red Bull have revealed the first images of the car they hope will propel Max Verstappen and new signing Sergio Perez to a 2021 title challenge.
McLaren boss Zak Brown expects "very tough" opponent Aston Martin to be boosted by the arrival of Sebastian Vettel this year.
Alfa Romeo have launched the car they hope will start to transform their Formula 1 fortunes in the 2021 season.
Keep across all the latest key dates and news ahead of the 2021 Formula 1 season, with Red Bull confirming their plans.
AlphaTauri have taken the wraps off their car for the 2021 Formula 1 season, the AT02, in the second launch event of pre-season.
McLaren chief Zak Brown believes talks over introducing sprint-race trials in 2021 are "encouraging" and should be viewed as a positive for F1.
Lewis Hamilton has described Marcus Rashford's leading role in tackling child food poverty as "truly inspiring".
McLaren's first Mercedes-powered car in seven years made its track debut at Silverstone on Tuesday.
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