FELIPE Massa has reportedly agreed to come out of retirement to rejoin Williams next season, if Valtteri Bottas departs to replace the retired Nico Rosberg at Mercedes.

The 35-year-old Brazilian announced his retirement in September and brought the curtain down on his 14 years in Formula One at the end of the 2016 campaign, but now seems set for a U-turn.

Williams hinted last week that they could let Bottas join Mercedes in 2017 if they could tempt Massa back.

Deputy team principal Claire Williams told BBC Sport: “If we did allow Valtteri to leave, we would only do this if an experienced, credible alternative was available, such as someone like Felipe Massa, for example.”

Reports in Italy, Brazil and Britain on Tuesday evening claimed Massa has indeed been persuaded to reverse his retirement decision, with the matter now dependent on Bottas’ next move.

Meanwhile, Williams have announced chief technical officer Pat Symonds will step down from his role – with rumours persisting that Paddy Lowe of Mercedes is set to fill the void.

Symonds has been with the British team since 2013 but is now leaving at the end of the year.

The 63-year-old, who had a storied history in F1, arrived at Williams from Virgin Racing in the middle of the 2013 season, helping the team to third in the constructors’ championship in his first full year.

Lowe, the technical executive director of reigning champions Mercedes, is widely reported to be close to a switch to a senior technical role at Williams.