Glasgow Warriors could be handed a 28-0 'defeat' in their cancelled Champions Cup match with Lyon, which would mean their hopes of progression were slim.
Twenty Glasgow players are isolating after a Covid-19 outbreak at Exeter, who beat Warriors 42-0 last weekend.
All sides in this year's tournament agreed to forfeit matches if fixtures could not be fulfilled due to Covid.
Fiji's opponents were awarded 28-0 wins when their Autumn Nations Cup fixtures were cancelled because of coronavirus.
European Professional Club Rugby (EPCR) is still awaiting test results from all the clubs involved. Once those results are known the matter will go to the EPCR Match Result Resolution Committee to determine the results of the cancelled matches.
A decision is expected within the next 72 hours.