European Professional Club Rugby (EPCR) on Thursday (AEST) announced that there will be an additional four clubs in Europe's premier club competition, with home and away quarter-finals played for the first time.

There will be two pools of 12 teams - eight apiece from the Premiership, Pro14 and Top 14 - and four rounds of matches, with no teams from the same league coming up against each other in the group stage.

The changes for the competition, which ends with a final in Marseille on 23 May (AEST), have been made on an exceptional basis amid the backdrop of the COVID-19 crisis.

Fourteen clubs will compete in the Challenge Cup - six from the Top 14, four from the Premiership and four Pro14 sides - and play four rounds of matches in a single pool, again not facing teams from their own country.

There will be a round of 16 before the quarter-finals and the final will take place in Marseille on May 21.

EPCR chairman Simon Halliday said: "With an expanded knockout stage and no repeats of domestic matches during the pool stage, this format creates brand new competitive opportunities for Europe's elite clubs and their fans.

"In this time of change, the Champions Cup with its global stars of the game, its passionate supporters and its unique match-day atmosphere undoubtedly remains The One to Win."