Felipe Massa is hoping to be retained by Williams for next season after seeing "no reason" not to continue for a 16th year in Formula 1.
The Brazilian came out of a short-lived retirement ahead of the 2017 season after Valtteri Bottas moved to Mercedes and now he wants to keep his seat for another campaign.
When asked by Autosport about whether he wants a Williams drive for 2018, he said: "Sure, yes. I’m really in good shape, the way I’m driving, the way I understand the car and everything.
“I have no reason not to stay in F1, but we’ll see what’s going to happen."
Massa's eagerness to stay is due to a change of approach in racing which has led to him enjoying each race more.
“I’m racing in a much more relaxed way and I’m happy with what I do in the car,” added Massa. “Unfortunately, I was a little bit unlucky in a few races, but I’m enjoying it.
“Not thinking about some other things that are sometimes inside your job just makes you more relaxed, doing what I like to do, enjoying it and no pressure.”
Williams technical boss Paddy Lowe has high praise for Massa, but did not provide any assurances about him keeping his seat for next year.
“Felipe is world champion material, we saw that from the season he was briefly world champion ,” Lowe told Autosport.
“He is clearly very talented and it’s a great pleasure to work with him and find out how he works.
“He’s a fantastic guy to work with: enthusiastic, friendly, very supportive of Lance and the learning that Lance needs to go through.
“He’s fun to work with and a very stable and dependable guy to have on the other side of the garage. I think if we could give Felipe the right car, he could go and get the job done.”
Williams have been putting the decision on their 2018 line-up on hold as they continue to weigh up their options.