The Grove-based team finished third in the constructors' championship two years in a row, but its performance has dropped this year and is currently fifth behind Force India.

Bottas, who is yet to announce his 2017 plans, believes Williams has not maximised its potential and admits the team was in much better shape two years ago.

"Williams can do better than this season," said Bottas ahead of the US Grand Prix. "Two years ago it was a lot better. We definitely not maximised our potential.

"The facilities the team has, they are good to fight the works team. We can do a lot better than this, but we will see.

"We've struggled a bit in the last couple of races with pure pace and obviously the team has focused a lot on next year's car."

Waiting on 2017 plans

Amid delays to announce his future, the Finn has recently been linked with a move to the Renault team.

Bottas suggested his plans will not be announced imminently.

"We need to wait a little bit to get things confirmed on what is going to happen next year," he said.

"I've had great time with the team and had some good results, but I feel like there could be more still to achieve together, so let's wait and see."

Additional reporting by Jonathan Noble