Lewis Hamilton was well off the pace as Mercedes were jolted by their "poor start" to testing ahead of the new Formula One season.

Gearbox trouble meant Valtteri Bottas could only complete six laps in the morning in Bahrain, before team-mate Hamilton had a clearer run and ran through 42 laps in the afternoon.

However, reigning drivers' champion Hamilton was only 10th-fastest on the day, with Red Bull's Max Verstappen topping the time sheets, while Bottas was the slowest of all the 17 drivers involved.

Mercedes' trackside engineering director Andrew Shovlin declared: "It's been a poor start to the season from us.

"Once we got running it was clear we didn't have the car in the right balance window and, while we made some progress during the day, we're not happy with how the car is performing and it's pretty clear we have some work to do."

The Mercedes W12 is the car with which the team hope to land an eighth consecutive constructors' title, while Hamilton will be chasing a fifth successive drivers' championship and a record eighth overall.

Hamilton said: "Today definitely wasn't the cleanest of days that we've had, but these things are sent to try us.

"Everyone has worked extremely hard to get us here. We had that mishap in the morning which was very unfortunate for Valtteri in terms of losing time on track and the team is working hard to try and understand what that was.

"I think they did a great job to turn the car around. The second session wasn't without its challenges, but we exist to find solutions to the problems we're faced with."

Hamilton was affected by a sandstorm and said Mercedes would look to "take the positives" from their shaky day, with two more days of testing to come.

Positives were not immediately obvious, and Bottas said: "In recent years, things have been pretty much bulletproof so it's not a familiar experience."

However, the Finn added on the team's website: "I am confident we can recover and I’m looking forward to two good days over the weekend."

As well as testing, Bahrain will host the opening grand prix of the Formula One season, with that race scheduled for March 28.

Silverstone is "absolutely" open to hosting one of the proposed new Formula One sprint races in 2021.

Plans have been drawn up to introduce shorter races on Saturdays at three circuits, which would precede the traditional grand prix a day later.

F1 president Stefano Domenicali told the Daily Mail that Silverstone was one of the proposed venues for the inaugural races, with teams said to be broadly in support of the new format.

The grands prix in Montreal, Monza and Interlagos are also reportedly under consideration to host sprint races.

Asked by Sky Sports if Silverstone welcomed the proposals, the circuit's managing director Stuart Pringle said: "Absolutely.

"If F1 should decide that Silverstone is the right venue for a sprint race then we would be totally supportive of that and feel it would be a fantastic spectacle for the fans."

The idea was first mooted in a meeting of the Formula One commission in February, after which F1 and governing body FIA issued a statement that said: "All teams recognised the major importance of engaging fans in new and innovative ways to ensure an even more exciting weekend format.

"There was, therefore, broad support from all parties for a new qualifying format at some races, and a working group has been tasked with creating a complete plan."

The proposal is for the sprint races, lasting roughly 30 minutes, to take place on the Saturday of a grand prix weekend. Qualifying would be moved to the Friday in place of the second practice session, with results determining the starting grid for the sprint event.

These shorter races would offer points for drivers and constructors, with the precise numbers yet to be determined, and decide the starting order for the main event on Sunday.

There would be no podium celebration after the sprint race, according to Domenicali, who is keen to preserve "the prestige of the grand prix itself".

Williams team principal Simon Roberts said this week, as per Race Fans: "We're all running carry-over cars [from 2020]. So fundamentally, we're not expecting massive shifts in the pecking order. So, let's try something.

"But there's a lot of detail being discussed in the background. The idea's cool, the concept's easy, but then in the detail, how do you actually [run] the weekend – how do you do tyres, what can you do, what can't you do – that's still in negotiation."

George Russell hopes Williams can make a flying start to the Formula One season in Bahrain - but he believes Mercedes are the only team who will be sure they are race-ready.

British driver Russell caught the eye when he replaced Lewis Hamilton at Mercedes for one race last year, after the world champion tested positive for COVID-19 and missed the Sakhir Grand Prix.

He went close to winning that race until a pit-stop error and a puncture late on cost him a probable victory, and he then returned to his regular drive at Williams.

Mercedes have assured Russell, who is part of their junior driver programme, that he can have a racing future with them if his development continues as expected.

That could come as soon as next year, but for now Russell's focus is on delivering for Williams.

The team has been in transition following the takeover by Dorilton Capital, and German motorsport veteran Jost Capito was appointed chief executive officer during the close season.

Russell believes Williams, who failed to score a point last season, should be better placed in 2021 to at least improve on that disappointing outcome.

"We want, the bare minimum, to be fighting with the Haas and the Alfas, as we did last year, and closing the gap to that midfield," Williams said.

"We made nine out of 17 Q2 appearances and that is definitely a thrill. That's got to be almost an aim every weekend for myself and team."

The season begins in Bahrain on March 28, and by then there should be evidence of which teams have made progress since 2020, with testing taking place, also in Bahrain, on the March 12-14 long weekend.

Russell admits it is a waiting game to see how rivals have advanced, or regressed.

"Fingers crossed that they go backwards and we go forwards," he said, in an Instagram chat on Formula One's official page. 

"Ultimately, we may go to Bahrain and see every other team has progressed more than us.

"We may go there and see we've made great progress. Until we get to Bahrain not a single team, probably bar Mercedes, can tell you how they're going to perform."

Russell, 23, has been tipped for a big future in the sport. He also believes Williams, a great name from the history of Formula One, can begin a journey back to the top of the sport.

"The arrival of Jost is massive for the team, really exciting," he said. "The future for Williams and everybody here at Grove [the team's headquarters] is really great.

"Unfortunately, things don't change in a matter of moments in Formula One, but the building blocks are really getting set in stone.

"Jost has loads of experience, he's a great character, and I think he's going to bring a lot of motivation to the team."

Russell was speaking on the day F1 chiefs confirmed the Portuguese Grand Prix on the new season's calendar, with the race inked in for May 2.

It will be the second round of 23 in the championship, with Portugal having returned to the Formula One rota last year for the first time since 1996.

George Russell has no intention of "hassling" Mercedes over his future as he focuses on trying to get the most out of a new-look Williams car in 2021.  

The British driver is heading into the final year of his contract with Williams, where he will once again work alongside Nicholas Latifi for the season.  

It will be a third year for Russell with the team, though he did step in to drive for Mercedes - having previously been part of their junior driver programme - at the 2020 Sakhir Grand Prix, replacing Lewis Hamilton after the seven-time world champion tested positive for COVID-19. 

His performance in the race - he was in front for the majority before a slow puncture forced him to settle for ninth place - led to speculation over a permanent switch, but Hamilton and Valtteri Bottas have remained together.  

While a move could still happen at some stage further down the line, Russell is relaxed over his standing within Mercedes.  

"Mercedes and Toto have always had my back and believed in me from day one. When they believe the time is right, the time will be right," he told Sky Sports at the launch of Williams' FW43B car.  

"I'm not hassling them, I’m just going out there and doing my job on the track. What comes in the future will come.  

"Obviously I had a great opportunity in Bahrain last year, but for now we will focus on the job here at Williams for this season and trying to get the most out of it."

In a somewhat surprising move, Hamilton only agreed to a one-year extension earlier this year, committing him to a ninth season with Mercedes.

Bottas' deal runs "at last until the end of 2021", per the team's statement when the Finn's future was revealed last August, so Russell could potentially be considered to replace either driver in 2022.

"Every driver wants to put themselves against the best," he said when asked if forming a partnership with Hamilton appealed to him.

"I believe in myself and Lewis is the benchmark at the moment, but equally you have a lot of fantastic drivers out there who might not have the same CV as Lewis.  

"Max [Verstappen], Charles [Leclerc], Lewis – they are all on the same level. Putting yourself against one of those three would be great for any driver."

Williams - now owned by Dorilton Capital - unveiled a new blue, white and yellow livery on Friday that takes inspiration from the team's successful cars in the 1980s and 1990s.

Sebastian Vettel is excited to get the 2021 Formula One season underway with Aston Martin, with the former world champion seeing plenty of potential at his new team.

Vettel, a four-time F1 champion, left Ferrari at the end of the 2020 campaign, bringing an end to a six-season stint with the Italian manufacturers.

Charles Leclerc had usurped him as Ferrari's number one driver, and Vettel slumped to a 13th-placed finish in last year's drivers' standings, claiming just one podium finish.

Vettel has now switched to Aston Martin, who have rebranded the Racing Point team to make their F1 return after a 61-year break from the competition. 

The German made no secret of his disappointment at how his final season at Ferrari panned out but is anticipating an exciting debut year with Aston Martin.

"I am not happy with last year in terms of performance – partly my performance – but I accepted it," said Vettel at the unveiling of the AMR21 car on Wednesday, which also featured NFL great Tom Brady and Hollywood star Daniel Craig.

"There are things that didn't go well, but I am looking forward to this year.

"I go racing to win and obviously it's a very exciting project, a new start and a new chapter for the entire team. I'm very much looking forward to it.

"Winning is maybe a bit ambitious straight away, but it's everybody's goal, it's why we go racing.

"Even though I have raced for four Formula One teams and for many years, starting a new season with a new team still gives me a sense of excitement.

"I see potential. I think the team has always been very successful in the past with limited resources, now the regulations in F1 are changing, and with the new launch of Aston Martin coming back, a lot of talented people joining and coming together to this already good group already, I think it's [his arrival is] only an addition.

"So I hope that I can contribute as well, and I think if we keep sharing that joy and passion then good things will follow."

Vettel's Ferrari future was decided before the 2020 season – which was derailed due to the COVID-19 pandemic – had started, yet he claims to have had no doubt that Aston Martin was the right move. 

"As a driver, I have always kept my eye on the competition and this team has consistently impressed me with what they have been able to do without the biggest of budgets," he added.

"So, when Lawrence [Stroll] and Otmar [Szafnauer] approached me last year, and explained what their ambitions were, I was immediately very motivated to join the team.
 
"I love the history of motor racing and Aston Martin is one of the great names of the past, so it is fun to be part of their return to Formula One after an absence of 61 years.  
 
"I have not driven the car yet but I think it looks great. I am really looking forward to getting it out on the track. I am also looking forward to working with and getting to know better everyone in the team, including my team-mate Lance [Stroll]. We will certainly make a big effort to deliver some good results together and have fun doing it."

Toto Wolff admitted Max Verstappen is a driver who will be "on everybody's radar" but has vowed Mercedes will not rush to seduce the Red Bull star.

Mercedes team principal Wolff will be aware that reports have linked Verstappen with a possible future move to the Silver Arrows, possibly as a long-term replacement for Formula One champion Lewis Hamilton.

For now, though, Hamilton is going nowhere, having signed a contract for the upcoming 2021 season, and the British driver may yet remain for years to come.

After landing a seventh drivers' title last year to match Michael Schumacher's F1 record, there is no driver that Mercedes would take above Hamilton in the present time.

Wolff said: "The symbiosis that we have in the relationship, it's always that we have a mutual understanding of what we want to do in the future. That will be also the case in the discussions with Lewis going forward.

"Max is certainly an outstanding young driver that will be on everybody's radar in the future, but we are not flirting outside before we have a clear understanding with our two drivers."

Verstappen has finished third in the championship in each of the last two seasons, with the 23-year-old winning races at Silverstone and Abu Dhabi during the 2020 campaign.

He tallied 214 points to finish just nine points behind Mercedes' runner-up Valtteri Bottas in the championship.

Quoted widely after Mercedes unveiled their new W12 car on Tuesday, Wolff underlined how Mercedes are not blinkered about the team's future and the potential for a change of direction.

Bottas is also due to reach the end of his contract after the new campaign, meaning Mercedes currently have flexibility should they wish to reshape their driver line-up for 2022 and beyond.

"Our first discussions are going to be with Valtteri and Lewis in respecting our values, integrity and loyalty - but on the other side the young drivers are the future," Wolff said.

"Therefore we need to consider how we want to set ourselves up for the years beyond."

Lewis Hamilton says his decision to only sign a one-year contract with Mercedes should not cause concern as he prioritises his drive for more diversity in Formula One.

It took until February before seven-time world champion Hamilton and Mercedes finally announced they had come to terms on a new contract.

The agreement was only for 2021, the last season before sweeping regulation changes come into the sport.

Hamilton, 36, insists there should be no doubts over his commitment.

The Briton also spoke of his passion to fight for change and equality in F1 and wider society.

That will serve as his main focus in a year where he could surpass Michael Schumacher outright with an eighth title.

"I'm kind of in a fortunate position where I've achieved most of the stuff I wanted to achieve up until this point, so there's no real need necessarily to plan too far ahead in the future," Hamilton said at the launch of Mercedes' new W12 car.

"I'm fully invested in this season and delivering. I still love what I do.

"We're living through an unusual period of time in life and I just wanted one year. Then we can talk about if we do more, and keep adding it [by] one if we have to.

"I chose to have a one-year deal, so I can see where we are at. It doesn't mean I'm not committed.

"What I'm really focused on - there was a lot of discussion around the diversity issue, what is important is that we are delivering."

Hamilton added: "I'm really proud of my team, I'm already seeing steps to see that progress. That's my driving force to make sure we continue to push for accountability.

"The main priority for 2021 - in the past it was about just winning championships. But now it's really pushing for making real change.

"Last year there was discussion about equality and inclusion and there was a lot of talk this year about pushing for diversity and really making sure that action is taken.

"That's at the core of the drive for me, but of course we exist to win. That is what all these guys and girls here are working towards, so that's my goal to deliver it for them."

Mercedes boss Toto Wolff echoed the comments of Hamilton and is not concerned about the short deal.

Wolff said: "No doubt about his commitment. First of all, he enjoys racing a lot. We enjoy working with each other and we discussed that a lot.

"But he’s absolutely right. The times change, new priorities for all of us in terms of the way we live, our health, he is very passionate about his initiatives against racism and inequality.

"Then we have this massive regulatory change in 2022 that is going to reshape what Formula One will be.

"I don't think this will play a role, but I think it's fair for a driver who has won seven championships to have the flexibility to decide what he wants to do in future.

"We have agreed that we want to pick up the discussions much earlier this year to avoid a situation like we had in 2020, to run out of time and be in the uncomfortable position that we have no time left before the beginning of the season."

The 2021 season is scheduled to get under way with the Bahrain Grand Prix on March 28.

Australian star Daniel Ricciardo vowed to "close the gap" in the race for Formula One championship glory and the new McLaren driver is refusing to make any excuses.

Ricciardo enters his 11th season in F1 having switched from Renault to McLaren, but the 31-year-old does not expect the transition to hold him back.

Since entering F1, Ricciardo has claimed seven grand prix victories and 31 podium finishes, while he earned fifth place in the drivers' championship during the coronavirus-hit 2020 season.

After moving to McLaren to replace new Ferrari driver Carlos Sainz Jr. and pair up with the returning Lando Norris, Ricciardo has an eye on climbing the ranks.

"What I expect out of myself in 2021 is to really hit the ground running," Ricciardo said.

"Naturally it does take some time to learn a new team, a new car, but I guess I'm going to be hard on myself, not to give myself too much time.

"I think with Renault I was the same. I really wanted to be there by Melbourne, that first race, but naturally it did take a bit of time.

"I don't want to be naive but I also want to make sure I'm just leaving no stone unturned and really by the end of year I've had a big contribution to the team, moving forward and closing the gap."

Fernando Alonso had surgery on a jaw fracture after a road accident while cycling but is expected to be fit for the start of the 2021 Formula One season.

There were initially doubts the two-time F1 champion would be ready to make his return to the series after a two-year absence at the season-opening Bahrain Grand Prix on March 28 following the incident in Switzerland on Thursday.

Alonso underwent an operation on his jaw and is expected to remain in hospital until Sunday at the earliest.

However, Alpine have confirmed they do not expect the injury to have any impact on their preparation for the new campaign, with pre-season testing scheduled to take place at Sakhir from March 12-14.

"Following his cycling accident yesterday Fernando Alonso was kept under observation in hospital in Switzerland," read an Alpine statement issued on Friday.

"Medics discovered a fracture in his upper jaw and conducted a successful corrective operation. The attending medical team are satisfied with his progress.

"Fernando will remain under observation in hospital for a further 48 hours.

"Looking forward, after a few days of complete rest, he will be able to progressively resume training. We expect him be fully operational to undertake preparation for the season.

"Alpine F1 Team and Fernando thank you for your wishes and will issue further updates when appropriate."

Fernando Alonso is "conscious and well in himself" after the two-time Formula One world champion was involved in a road accident while cycling.

Alonso, 39, is set to return to F1 with the Alpine team this season, after a two-year absence, though there will now be doubts over his participation at the first race in Bahrain next month.

The Spaniard won successive F1 world championships in 2005 and 2006.

On Thursday, Apline confirmed in a statement that Alonso had been involved in an incident while cycling in Switzerland.

However, the statement did not confirm if Alonso was in hopsital.

It read: "Fernando is conscious and well in himself and is awaiting further medical examinations tomorrow [Friday] morning.

"Alpine F1 Team will not make any further statement at this point in time. Further updates will be given tomorrow."

Lewis Hamilton has signed a new contract to race for Mercedes in the 2021 Formula One season, it has been confirmed.

The reigning F1 champion will spend a ninth season with the Silver Arrows after winning a record-equalling seventh drivers' title in 2020.

Mercedes and Hamilton have agreed a deal that includes the formation of a joint charitable foundation with the aim of supporting greater diversity and inclusion in Motorsport.

Hamilton said: "I am excited to be heading into my ninth season with my Mercedes team-mates. Our team has achieved incredible things together and we look forward to building on our success even further, while continuously looking to improve, both on and off the track.

"I'm equally determined to continue the journey we started to make motorsport more diverse for future generations and I am grateful that Mercedes has been extremely supportive of my call to address this issue.

"I'm proud to say we are taking that effort further this year by launching a foundation dedicated to diversity and inclusion in the sport. I am inspired by all that we can build together and can't wait to get back on the track in March."

Team principal Toto Wolff added: "We have always been aligned with Lewis that we would continue, but the very unusual year we had in 2020 meant it took some time to finish the process.

"Together, we have decided to extend the sporting relationship for another season and to begin a longer-term project to take the next step in our shared commitment to greater diversity within our sport.

"Lewis' competitive record stands alongside the best the sports world has ever seen, and he is a valued ambassador for our brand and our partners.

"The story of Mercedes and Lewis has written itself into the history books of our sport over the past eight seasons, and we are hungry to compete and to add more chapters to it."

In a 2020 season that was truncated due to the coronavirus pandemic, Hamilton still made history by breaking Michael Schumacher's all-time F1 wins record with his 92nd victory at the Portugal Grand Prix.

This year he will hope to surpass Schumacher and become the first F1 driver in history to win eight world titles.

The 2021 season is scheduled to get under way with the Bahrain Grand Prix on March 28.

Lewis Hamilton has signed a new contract to race for Mercedes in the 2021 Formula One season, it has been confirmed.

Pierre Gasly has become the latest Formula One driver to confirm a positive test for coronavirus.

The Alpha Tauri driver confirmed he is self-isolating and "feeling ok".

Frenchman Gasly wrote on Twitter: "Hello everyone, I hope you're all safe and well.

"I wanted to let you know that I tested positive for COVID-19. I have told everyone I've been in contact with during these last days.

"I'm currently self-isolating and following the protocol set by the local health authorities. I'm feeling ok and will continue to follow my training plan from home while I remain in isolation. Take care."

Six drivers on the grid have now tested positive for coronavirus, with world champion Lewis Hamilton having been among those towards the end of the 2020 season.

Racing Point drivers Sergio Perez and Lance Stroll also missed races due to COVID-19 last year, while Ferrari's Charles Leclerc and Lando Norris of McLaren contracted the virus during the close season.

Jenson Button has returned to Williams in a senior advisory role after agreeing a multi-year deal.

Button was given his Formula One break by Williams 21 years ago when he was handed a drive for the 2000 season.

The 41-year-old Briton went on to be crowned F1 world champion during his time with Brawn in 2009 and retired in 2016 with 15 race victories to his name.

Button now returns to Williams, who were sold to American private investment firm Dorilton Capital last year as the Williams family ended their 43-year-old involvement in F1.

He will be tasked with passing on his experience at grands prix, while also attending team events in the United Kingdom.

Englishman Button said: "I am so delighted to once again be able to say that I've signed for Williams. Back when I was 19 it was a moment that changed my life and, despite the fact it was over 20 years ago, I already feel like I never really left.

"Sir Frank Williams showed faith in me which I will be eternally grateful for and I am incredibly excited to have the chance to come back and help the team as it strives once more for success."

Incoming Williams Racing chief executive Jost Capito said: "Bringing Jenson back on board is another positive step to help us move forward as a team both on and off track. Jenson has always been a friend of the team and so it is great to welcome him back into the Williams family.

"Back in 2000, Sir Frank saw the promising talent Jenson had as a driver and gave him his first opportunity in F1. He more than fulfilled that initial promise throughout a glittering career that culminated in world championship glory.

"More recently, he has shown his acumen in both the business and broadcasting worlds and remains a widely respected figure in the paddock."

Alpine have appointed Davide Brivio, the former boss of MotoGP team Suzuki Ecstar, as their racing director.

Renault announced the departure of team principal Cyril Abiteboul on Monday ahead of their rebrand to Alpine for the 2021 Formula One campaign, and now they have added new blood.

Brivio was linked to F1 after quitting his post with Suzuki Ecstar, who won the team and rider championships in last year's MotoGP season.

An Alpine statement read: "Davide Brivio joins Alpine F1 Team as racing director.

"We are delighted to confirm Davide Brivio will strengthen our team ahead of the 2021 Formula One season. His specific role and responsibilities will be announced in the coming weeks.

"Davide will report to the Alpine CEO Laurent Rossi.

"Davide joins Alpine F1 Team with a wealth of experience and success following more than 20 years in the MotoGP world championship.

"We look forward to welcoming Davide as we start the next stage of our Formula One journey."

Alpine's driver line-up is made up of Frenchman Esteban Ocon and former two-time champion Fernando Alonso.