The European Champions Cup and Challenge Cup have been temporarily suspended after the French government recommended that matches against clubs from Britain be postponed amid the ongoing coronavirus crisis.
European Professional Club Rugby (EPCR) announced the development on Monday.
EPCR and Ligue Nationale de Rugby held a meeting last week with the French sports ministry, which recommended postponing January's fixtures – both home and away – between French clubs and those in the United Kingdom and Ireland.
"Following a directive from the French authorities that the participation of TOP 14 clubs in the Champions Cup and Challenge Cup at the current time constitutes too great a public health risk, EPCR has no choice but to announce that the 2020/21 tournaments are temporarily suspended," it said in a statement.
"On the basis of this directive, EPCR had no choice but to temporarily suspend the pool stage of the Champions Cup and the preliminary stage of the Challenge Cup."
The Champions Cup was set to resume on Friday with Northampton Saints taking on Leinster while Toulon were scheduled to host Scarlets.
The United Kingdom has recorded more than 3 million confirmed Covid-19 cases and more than 81,000 deaths, with a highly infectious variant of the novel coronavirus prompting many countries to close their borders to Britain.
The Six Nations is also set to begin on 6 February and French rugby federation president Bernard Laporte said over the weekend that he remained optimistic that the tournament would go ahead as scheduled.
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