Seven European rugby matches due to be played between French and British teams this weekend have been postponed because of France's new travel rules.
On Saturday, Bath v La Rochelle and Sale v Clermont in the Champions Cup will not go ahead, nor will Worcester v Biarritz in the Challenge Cup.
Scarlets v Bordeaux, Toulouse v Wasps, Stade Francais v Bristol and London Irish v Brive are all off on Sunday.
Tournament organisers hope the games can be played at a later date.
Earlier this week, France announced that from Saturday travellers who are not French residents or citizens must have a "compelling reason", provide a negative Covid test less than 24 hours old and isolate for at least two days.
Tournament organisers EPCR said: "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."
EPCR added it would "provide a further update as soon as practicable".
Ospreys' game against Racing 92 on Saturday had already been called off, with the French side awarded a 28-0 bonus-point win because of coronavirus cases in the Welsh camp.
The same happened to Leinster, with Montpellier given a 28-0 win for the fixture due to be played on Friday night because of the Irish province's Covid cases.
And Saracens suffered the same fate for their Challenge Cup game against Pau, which had been scheduled for Saturday.