George Russell is unconcerned over speculation surrounding his future at Williams, insisting he remains under contract with the team following a change of ownership.

Russell and Nicholas Latifi were confirmed in their seats for the 2021 season in July, though that was prior to the confirmation of the takeover by Dorilton Capital.

The American private investment firm, which completed its purchase of the then financially troubled Williams in August, is reportedly interested in bringing in Sergio Perez, who is with Racing Point in 2020.

Yet Russell, who has been impressed by the new owners, made clear ahead of the Portuguese Grand Prix that nothing has changed with regards to his position.

"I've got a contract for next year. I've obviously seen speculation," Russell - who is part of Mercedes' young driver stable - told Sky Sports F1.

"The facts are there are a lot of great drivers on the grid looking for race seats, some of which have a lot of backing behind them which is obviously a major consideration. 

"But for me, I have a contract and I think the future of Williams is in really great hands because of the new owners.

"The financial issues that were surrounding the team over the past couple of years are not necessarily there anymore because the new owners and investors have the money, they are investing the money.

"We have been through a very tough time in the past 18 months and we're all excited to hopefully get a glimmer of success into the next 18 months under the new ownership. So even more so now under the new owners there's less to worry [about]."

While Russell expects to continue on the grid for next year, Romain Grosjean is unsure he will get a seat for 2021 as he prepares to depart Haas.

Both Grosjean and team-mate Kevin Magnussen will be leaving at the end of this season and job opportunities in F1 are in short supply.

"Most likely Formula One is closing its doors. There aren't many seats left available," Grosjean said.

"It's never impossible, so never say never, but also there are other challenges that I'm ready to tackle. Different challenges, different categories.

"After 10 years of F1 you learn a lot and I've achieved a lot, I'm happy with what I've done. If I could go back in time, there's obviously a few races where I would act differently.

"But as I say, I'm Romain Grosjean, I've got my weaknesses, I've got my strong points, but if you give me a winning car we'll win the race."