Bottas has settled in well at Mercedes; here he chats with a member of his crew in the pits at Spa-Francorchamps ahead of the Belgian Grand Prix. Picture: Geert Vanden Wijngaert / AP

Spa-Francorchamps -  Valtteri Bottas is set to stay at Mercedes for 2018, with only small details remaining to be signed off.

Team boss Toto Wolff old reporters at the Belgian Grand Prix: "It's a no-brainer as it stands for next year to continue with Valtteri," after Ferrari confirmed Sebastian Vettel had signed a three-year contract extension. That news ended speculation that Vettel, who would have been out of contract at the end of the season, could switch to Mercedes.

Wolff said: "It's just down to the nitty-gritty details and the paperwork and see how it pans out in the future. There's a pretty big chance he will be here next year."

Bottas arrived at the Formula One champion in January as a replacement for 2016 world champion Nico Rosberg, who had stunned the sport by announcing his sudden retirement in December.

Settled in well

Bottas, who had management links with Wolff when he was at Williams, has settled in well at Mercedes and has won two of his first 11 races with the team. He's now third in the standings, 34 points behind triple world champion team mate Lewis Hamilton, who is in turn seven adrift of championship leader Vettel.

Bottas has also finished on the podium in his past five races, scoring more points than any other driver over that period, with eight top-three places to date. He and Hamilton also get on well, with the Briton saying earlier in the week that he saw no reason for anything to change.

"There is another new element in the team and it works," Hamilton, whose relationship with Rosberg was far more intense, told reporters. "I don't believe any of the bosses or any of the individuals within the team is unhappy with what is currently in place, so I find it hard to believe they will change that."

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