Twickenham will host the Heineken Champions and Challenge Cup finals, it has been announced, with a limited number of fans set to attend.
The games were originally due to be played in Marseille but uncertainty over Covid-19 travel restrictions saw that plan cancelled with the French city now due to host next season's finals.
Leinster face La Rochelle away in the Champions Cup semi-final on Sunday, while Toulouse meet Bordeaux Begles tomorrow.
The decider will take place on Saturday, 22 May at 4.45pm.
Ulster, meanwhile, clash with Leicester at Welford Road this evening with the winner earning a spot in the Challenge Cup final against either Bath or Montpellier on Friday, 21 May at 8pm.
Organisers say that, subject to licence being granted by the London Borough of Richmond-upon-Thames, 10,000 fans may attend each game.
Tickets go on sale at 5pm today.
"Fans are the lifeblood of European club tournaments and we are delighted to be able to welcome them back in a Covid-secure environment for this season's finals," said European Professional Club Rugby chief executive officer Vincent Gaillard.
"Twickenham has a storied history with club rugby’s greatest tournament, and it will be a fitting venue to see silverware contested next month.
"For the final matches at Twickenham Stadium, EPCR is advising fans to adhere to government advice (locally and in their territory, if not based in the United Kingdom) before making any travel arrangements.
"All spectators who attend either final are required to read and sign up to a code of conduct.
"Face coverings will be mandatory within the stadium, unless a spectator is in an assigned seat consuming food or beverages, and social distancing will be required at all times."
The EPCR also confirmed that next season’s Champions Cup will again consist of eight teams from the Guinness Pro14, the Premiership and the Top 14.
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Follow La Rochelle v Leinster (Sunday, 3pm) and Leicester v Ulster (Friday, 8pm) via our live blogs on RTE.ie and the RTÉ News app or listen live on RTÉ Radio 1's Sunday Sport and RTÉ Radio 1 Extra.