George Russell will deputise for Lewis Hamilton at this weekends Sakhir Grand Price.
The world champion has been forced to miss the race after testing positive for Covid-19. The Englishman woke up with mild symptoms on Monday morning and subsequently tested positive for the virus.
He is now self-isolating but reported to be in good health otherwise.
It is not clear how he contracted it, given that he had d three negative tests last week, including one on the same day as the Bahrain Grand Prix which he went on to win. However, it has since been confirmed that somebody he had been in contact with prior to arriving in the Middle Est has subsequently contracted it.
Russell is part of the Mercedes young driver line-up and is managed by Mercedes Toto Wolf. He currently drives for Williams, after being released to join them on a three-year contract from the start of last season.
He has yet to score a point yet in his F1 career, driving the least competitive car on the grid, but he has still managed to impress, particularly in qualifying, where he consistently makes it through to P2, easily out-performing his teammate Nichols Latifi.
Tipped as a potential future champion, Mercedes will now have the opportunity to see what he can do in the fastest car in the field.
Taking Russells place in the Williams will be their reserve river Jack Aitken, who will be making his F1 debut this weekend. He was a practice driver for them at the Styrian Grand Prix earlier this season and has been competing in the Formula Two series this year, finishing on the podium twice.
Although Russell is only due to replace Hamilton for this weekend, his temporary assignment could stretch to two races. That is because the final Grand Prix of the season takes place in Abu Dhabi only a week after the conclusion of Sundays race. To be able to race in that, Hamilton will have to test negative for the virus at least 96 hours before it begins.