Felipe Massa has announced his retirement from Formula One at the end of the 2017 season.
The Williams driver intended to quit F1 at the end of 2016 but completed a retirement U-turn to return to Williams after Valtteri Bottas moved to Mercedes following the retirement of world champion Nico Rosberg.
In a statement, the Brazilian said: "As everyone knows, after announcing my retirement from Formula One last year, 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 One will finally come to an end this season.