Felipe Nasr said he was pleased to drive for Williams for a final time in the Abu Dhabi test but is ready to take the lessons he has learned in 2014 to Sauber.

Having been Williams reserve driver this season, Nasr is set to move to Sauber for a race seat alongside Marcus Ericsson next year. However, Williams ran Nasr in its car for the final day of testing at the Yas Marina Circuit and he said he enjoyed getting one more run for the team before moving on over the winter.

"It's good to have a last test in the car, to work with the guys one more time," Nasr said. "It's been a great year together to drive the FW36. We did some different kind of programs, more focused on the 2015 tyres and the long runs, so for myself it was a good experience. I think all the things I've learned this year for sure I can take on to Sauber next year."

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Asked if he was sad to be leaving Williams, Nasr replied: "It's not nice to leave but I understand that professionally I have to take the next step. I wish them the best and maybe one day I will come back."

And Nasr also said he was grateful to the support he received from both Felipe Nasr and Valtteri Bottas during his time at Williams.

"It's been a good relationship, not only with [Massa] but with Valtteri as well; he's a good guy and a good driver. They're all very keen to help, very open, so it was good to work with everyone - engineers, mechanics, drivers - for myself to take so much in one year driving GP2 at the same time ... it was tough to do both at the same time but in the end I feel that it's pretty good to have that extra."