FELIPE Massa has performed a u-turn and rejoined Grove-based Williams following Valtteri Bottas's move to world champions Mercedes.

The 35-year-old announced his retirement from Formula 1 at the end of last season.

But Williams today confirmed the Brazilian's return, with Bottas becoming Lewis Hamilton's new teammate.

The 27-year-old Finn had been linked with a move to the Brackley-based team since world champion Nico Rosberg announced his retirement in December.

While Mercedes have yet to announce the deal, Williams have confirmed Bottas's departure.

A statement from deputy team principal Claire Williams reads: "Valtteri has been part of the Williams family since 2010 and in that time has proved a huge talent, securing nine podium finishes.

"I would like to take this opportunity to thank him on behalf of the whole team, and wish him a successful season as he joins Mercedes.

"Felipe has always been a much-loved member of the Williams family, and having the opportunity to work with him again is something we all look forward to.

"He was always going to race somewhere in 2017, as he has not lost that competitive spirit, and it was important that we had a strong replacement in order for us to let Valtteri go.

"Felipe re-joining us provides stability, experience and talent to help lead us forward. He is a great asset for us."

Massa ended a three-year stint with Williams in November.

But he was expected to return to the sport if Bottas completed the move.

Massa said: "I have a passion for racing, for competing and for fighting on the track.

"My return is not about seeing Formula 1 as the best option, but is about seeing the role at Williams as the best option.

"I would not have returned for any other team."

Massa, who spent eight seasons with Ferrari before his move to Williams in 2013, said the switch to Mercdes was a "great opportunity" for Bottas.

The Brazilian added: "He is a talented racer and it was great working alongside him for three years.

"I wish him all the best for the next chapter of his career."