Williams driver Felipe Massa is to retire from Formula 1 at the end of the season – again.
The Brazilian first retired a year ago only to return to the team when Valtteri Bottas left to join Mercedes following the shock retirement of world champion Nico Rosberg.
But Massa, whose 267 Grand Prix starts are the sixth most in history, said his decision is final this time.
He said: “I agreed to return this season to help Williams when the call came. I have now enjoyed four great years with the team, but my career in Formula 1 will finally come to an end this season.”
Massa, 36, has won 11 grand prix in his career and joined Grove-based Williams in 2014.
Over the last four years, he has helped the team secure third place in the Constructors’ Championship in 2014 and 2015, and fifth place in 2016.
Massa, who achieved his biggest successes for Ferrari, thanked his supporters and said: “I take so many great memories with me as I prepare for my final two races in Brazil and Abu Dhabi, and although they will be emotional, I am looking forward to ending on a high note and preparing for a new chapter in my career.”
Williams deputy team principal Claire Williams said it has been “an absolute pleasure” to work with him.
She added: “We are especially grateful that he agreed to postpone his retirement from Formula 1 for a year, after Valtteri joined Mercedes, which demonstrated the depth of the relationship we built during our time together.
“We appreciate that it wasn’t an easy decision for him to return, after having such an emotional send-off at the end of last year.”
The team said it would announce its 2018 driver line-up in due course, although Robert Kubica, Paul di Resta and Pascal Wehrlein have emerged as the favourites to replace Massa.
Massa heads into his penultimate Formula 1 race in his home country on Sunday on 36 points.