Valtteri Bottas says Williams has the potential to make it to the top of Formula 1 with or without him as speculation on the Finn's future rumbles on.

The 25-year-old has been heavily linked with a move to Ferrari to replace his fellow countryman Kimi Raikkonen and says he is still undecided on where he will be for the 2016 season. Bottas has driven for Williams for the past four years and since stepping up from test driver and into a race seat in 2013 he has gained a number of admirers thanks to a string of rostrum results.

Despite a maiden F1 victory still eluding Bottas he believes the British team has the potential to return to winning ways before the end of the 2016 season, even if he does split from the team at the end of the year. Williams' last Grand Prix victory came in 2012 when Pastor Maldonado drove to a surprising win at the Spanish GP.

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"For sure, this season winning is really difficult and I think maybe next year Williams performance is going to show more whether it is possible or not," Bottas said. "I've always said I think it is possible, but in F1 it's never easy with any team. I believe in the future of Williams, it's a good team and it's been at the top many times.

"But I have no confirmation yet whether I am going to be a part of that or not and, like I said, whichever team I'm at I will give 100%."

Reflecting on the improvements Williams has made between 2014 and this season Bottas says the team has reached a similar point to where it was 12 months ago but hasn't made as much progress as expected.

"Everyone at Williams was hoping for a bit of a step again for this year, but the performance being more or less the same to last year at this point," he added. "We want it a bit better, but the competition is tough and that's how it goes.

"During this season we have improved again every time and next year's car could be a step forward, but it's too early to say."