Valtteri Bottas has said that he still does not know if he will be staying at Williams in 2017.

The British team are currently keeping their options open, amid links with Jenson Button and also Lance Stroll, a Canadian rookie who is said to have substantial backing behind him thanks to his billionaire father.

"There is still no progress," Finn Bottas, who has driven for Grove-based Williams since his debut in 2013, told Finnish broadcaster MTV.

"Everything is still open at this point."

During the week, Bottas was quoted as saying that he would be happy to stay at Williams, and he now says that he would like his future clarified "preferably sooner than later".

"I cannot say a specific date, but it would be nice to know what's going to happen before the August break. But if it stretches out further it would not be a disaster. I'm not stressed about it."

Last year, Bottas was linked to Ferrari but his situation looks different in 2016 amid the form of his teammate Felipe Massa and Williams's struggle to match the top three teams.

"Certainly the market value has not increased this year, that's clear," Bottas told Finnish newspaper Iltalehti.

"In a less competitive car and when you're rarely on the podium, you can be a little invisible.

"I'm not worried at all because the people who really follow these things know what's going on. I'm not worried about my future in Formula 1 but the fact is that at the moment I don't know what I'm doing next season."

Asked if he could be left without a seat at all, he answered: "I hope not but you never know."

Bottas admitted that Williams appears his best option as the team "has often been very good with new rules".

However, he also said that the team, currently fourth in the standings behind Mercedes, Ferrari and Red Bull, has disappointed in 2016.