This may be the Rugby Champions Cup’s inaugural season, but the feeling this weekend, as the two semi-finals are contested on French soil, is one of familiarity, given the identities of the four clubs involved.

Look in isolation at Leinster’s Rugby Champions Cup quarter-final with Bath at the Aviva Stadium today, and it is tempting to ponder what, if anything, has changed in this tweaked version of Europe’s premier club competition.