This season's Heineken Champions Cup final will not be held in Marseille as previously scheduled.
Organisers European Professional Club Rugby (EPCR) confirmed this morning that the final, and the Challenge Cup decider, also due to be played at the French city's Stade Vélodrome, would be moved to another location, which has yet to be decided.
The finals are due to be played on the weekend of 16/17/18 October.
Leinster, the four-time winners, and Ulster, the 1999 champions, are scheduled to play Champions Cup quarter-finals in mid-September, against Saracens and Toulouse respectively.
Marseille will get to host the 2021 finals, with the Tottenham Hotspur Stadium in London getting the 2022 finals.
Tickets purchased for this year's final will be valid for 2021 with refund details to be released shortly if fans cannot travel.
"Due to the many uncertainties created by the Covid-19 pandemic, it has been decided that the 2020 Heineken Champions Cup and Challenge Cup finals will not now be held in Marseille as planned and the matches will be played at a new venue or venues," the EPCR said.
"With tens of thousands of fans scheduled to travel to the south of France, the Board of EPCR and the local organising committee have agreed that insufficient safeguards are currently in place during the public health crisis to stage two high-profile matches at the 67,000-capacity Stade Vélodrome.
"As a consequence, EPCR is currently working with its shareholder leagues and unions to secure an alternative venue or venues for the two finals which will be played on the weekend of 16/17/18 October, and details will be announced as soon as practicable."