A "devastated" Lewis Hamilton has been ruled out of this weekend's Sakhir Grand Prix in Bahrain after testing positive for coronavirus.
The seven-time Formula One world champion, 35, who has "mild symptoms" but is "otherwise fit and well", will have to isolate at his hotel here in Bahrain for 10 days, also putting his participation in Abu Dhabi a week on Sunday in serious doubt.
One high-ranking source told the PA news agency that it is "unlikely" Hamilton will be able to race at the season finale on December 13 due to strict Covid-19 protocols.
Meanwhile Mercedes junior driver Russell, who is in his second season with Williams, could now be thrust into the spotlight.
Williams will be reluctant to let their star driver miss one, possibly two races, as the British team heads into the final stages of the season rooted to the foot of the constructors' championship.
A spokesperson for Williams did not wish to comment when contacted by the PA news agency.
Mercedes reserve driver Stoffel Vandoorne, formerly of McLaren, is the only other contender for Hamilton's seat.
An announcement is expected on Wednesday.
