Felipe Massa expects to be in demand in 2017 amid F1 rule changes

F1 faces its biggest rules overhaul since 2009 next year but Williams technical chief Pat Symonds thinks it will be more challenging for teams this time around as they will have to develop solutions with heavily restricted windtunnel hours and staff numbers.

Massa is confirmed for a third year at Williams alongside Valtteri Bottas in 2016, but his future is uncertain beyond that.

The Brazilian says he only intends to stay in F1 if he has a competitive package and hopes his experience will make him an attractive proposition.

"I think I have opportunity to carry on in a good level," Massa told Autosport.

"Next season will be a big change for everybody and people will be looking for experience.

"They will want drivers who know what to say and do to help the development of a team.

"So maybe it can be I stay in a good level, but it's difficult to say now."

Massa has contested 229 grands prix since coming into F1 with Sauber in 2002, claiming 11 victories and enjoying a career resurgence with Williams after a difficult end to his long Ferrari stint.

He says he does not feel pressure to make a decision on his future.

"I have another year of contract, I'm so happy here," he said. "This year, we will see what I do.

"If I don't have the opportunity to carry on in a level I believe I need and deserve, maybe I will stop.

"I will have time to think about it."