A five-week break has been implemented in the Premiership, with the Champions Cup and Challenge Cup quarter-finals pushed back.
Lyon and Toulouse were both winners in Sunday's Top 14 action, with Patricio Fernandez impressing for the former.
Racing 92 stretched their Top 14 winning run to five matches with a dramatic defeat of Toulouse.
There were reports Saracens faced expulsion from the European Champions Cup, but the holders have been hit with a fine.
Saracens will discover in London on Friday whether they will face any action for picking Titi Lamositele against Racing 92.
Top 14 front-runners Lyon won again, while La Rochelle's Arthur Retiere grabbed a hat-trick and Brive left it late.
The mercurial Finn Russell has been punished for a breach of team protocol just nine days before Scotland's first Six Nations game.
Championship-bound Saracens will be without Will Skelton until the end of next month following his dismissal last weekend.
A thrashing of Lyon ensured Leinster made it five wins from five in the European Champions Cup, while Racing 92 reached the last eight.
High-flying pair Lyon and Bordeaux Begles celebrated contrasting victories in Top 14 action on Saturday.