Toto Wolff says the onus is on Valtteri Bottas to deliver the performances to make his Mercedes stay a long-term one.
Valtteri Bottas has been confirmed as Lewis Hamilton's 2017 Mercedes team-mate, as Felipe Massa returns to Williams.
Valtteri Bottas has praised new team-mate Lewis Hamilton but is confident he can compete with the triple champion at Mercedes.
After Mercedes finally confirmed their driver line-up, here are 10 reasons why their Valtteri Bottas swoop makes sense for 2017.
Claire Williams expects an announcement on whether Valtteri Bottas is joining Mercedes or not to be made this week.
Jacques Villeneuve believes Williams would be right to let Valtteri Bottas join Mercedes and replace him with Felipe Massa.
A deal for Felipe Massa to return to Williams a month after his retirement from Formula 1 has been agreed, according to Sky sources.
Felipe Massa could return to F1 with Williams less than a month after leaving the team and retiring from the sport, Sky Sports has learnt.
Mercedes' board have no concerns over Toto Wolff's association with Valtteri Bottas as the team try to sign the Williams driver.
Sky F1's Martin Brundle believes Mercedes face a challenge to prise Valtteri Bottas away from Williams to replace Nico Rosberg.
Sky Sports News HQ's Craig Slater with the latest on Mercedes' move for Bottas and the chances of Paddy Lowe moving to Williams.
Mercedes have made an approach for Williams driver Valtteri Bottas to replace Nico Rosberg, according to Sky sources.
Valtteri Bottas believes he can win with Williams next year, revealing that is why he stayed with the team.
Eighteen year-old Lance Stroll will race for Williams in the 2017 Formula 1 season with Valtteri Bottas confirmed as his team-mate.
Sky F1 analyst Johnny Herbert expects Lewis Hamilton to keep the heat on team-mate Nico Rosberg.
Renault's chances of landing their reputed targets are fading as the final pieces of the 2017 driver market fall into place.
Sky Sports have crunched the numbers and analysed the data behind who the fastest starting driver is in F1...
Renault are keen to announce their 2017 driver line-up this month and have several different options to consider.
Felipe Nasr, Sergio Perez and Lance Stroll are the leading contenders to partner Valtteri Bottas after Felipe Massa's retirement.
Claire Williams insists Williams will have an "exciting line-up" next year, although she refused to confirm their drivers.
It's nearly time to see the new contenders...
First 2017 test to start on February 27
The 20 race dates for 2017
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Is Hamilton still favourite in 2017?