Leinster 19 Bordeaux-Bègles 41 This time there was no Champions Cup final heartbreak for Leinster, just humiliation. In their previous four defeats at the final reckoning, the Irish province could look agonisingly to key moments when the pursuit of a fifth star fell just short. But this was different. This time there could be no gnashing of teeth, no looking back ruefully at squandered opportunities. This time they came up alarmingly short against a Bordeaux-Bègles side who have, in the eight years since Leinster won the last of their Champions Cup crowns, established themselves as the new European superpower. The manner in which they retained their title was, quite simply stunning, with all the damage done in a first half that yielded five converted tries, finished by their outstanding captain, Maxime Lucu , Pablo Uberti, Louis Bielle-Biarrey (2) and Yoram Moefana. They have not lost a Champions Cup game since being beaten by Harlequins in the quarter-finals during the 2023-24 season.…