The EPCR has postponed all Heineken Champions Cup matches between French and British clubs this weekend.
It comes following a changes in travel measures between the two countries after a decision from the French government.
However, the EPCR says it will reschedule the five matches in the Champions Cup, as well as the two affected fixtures in the Challenge Cup.
That's in contrast to their approach with Leinster's meeting with Montpellier, which was due to take place tonight (Friday).
The Irish province - who were set to travel this morning - were forced to forfeit the fixture.
They had a number of positive Covid-19 tests, but had a fully fit squad still available to fulfill the match. It's understood Montpellier also had Covid issues.
It remains to be seen whether that decision will be revisited on foot of today's decision.
Munster's clash with Castres tomorrow, and Connacht's meeting with Leicester on Sunday, are both set to go ahead.
"Following a meeting of the EPCR Board today (Friday, 17 December) it has been decided that due to current exceptional circumstances, Round 2 matches in the Heineken Champions Cup and EPCR Challenge Cup between French and UK clubs scheduled for tomorrow (Saturday) and Sunday are postponed.
"This is a consequence of new travel measures between the UK and France which are being introduced by the French Government.
"The Board received briefings from the three professional leagues which included updated information from the respective governments, however, there were insufficient assurances that these matches would not be at risk.
"Therefore, the intention is to reschedule the following Round 2 fixtures to a later date:
HEINEKEN CHAMPIONS CUP
Bath Rugby v Stade Rochelais
Sale Sharks v ASM Clermont Auvergne
Scarlets v Union Bordeaux-Bègles
Stade Toulousain v Wasps
Stade Francais Paris v Bristol Bears
EPCR CHALLENGE CUP
Worcester Warriors v Biarritz Olympique
London Irish v CA Brive
"All other Round 2 matches scheduled for this evening (Friday), and over the weekend, will go ahead as planned.
"EPCR will provide a further update as soon as practicable and will continue to liaise directly with all clubs, leagues and stakeholders."