Mercedes team principal Toto Wolff confirmed at the Belgian Grand Prix that a decision had been made regarding its 2022 driver line-up but that the delay in announcing Lewis Hamilton's partner was down to sorting the futures of both drivers.
With Russell joining Mercedes, Bottas will move to replace fellow Finn Kimi Raikkonen at Alfa Romeo, with the 41-year-old to retire from F1 at the end of the season.
After the Italian manufacturer re-signed to stay in F1 with Sauber, more freedom was given to the team over its driver line-up as previously its seats were dictated by Ferrari and its junior driver academy.
Antonio Giovinazzi is also expected to lose his drive at the end of the season in favour of Mercedes' Formula E champion Nyck de Vries, with the Italian remaining as part of the Ferrari programme.
Russell’s move opens the door for Alex Albon to return to the F1 grid, with suggestions the Williams vacancy is set to be filled by the Thai-British driver.
Albon has performed reserve duties for Red Bull since being dropped at the end of last season whilst also competing in the DTM championship in Germany.
GPFans is a multi-platform, multi-language brand dedicated to Formula One coverage. We bring you all the ins and outs of the sport, 24/7, everything from up-to-the-minute news and features to the latest viral stories and clips.
We believe that a new generation of exciting, outspoken drivers will make F1 more popular than ever before, and we want to give our users access to as much of their heroes as possible, on and off the track. From Lewis Hamilton to Max Verstappen, Daniel Ricciardo to Sebastian Vettel, we provide in-depth analysis of every every Grand Prix in the season, from Australia to Abu Dhabi.
With Formula One under the new ownership of Liberty Media, how the sport is being covered is evolving, and GPFans will look to be at the heart of this progression into new media, as one of the fastest-growing sites covering the king of motorsports.