Leinster coach Michael Cheika watched his European champions fall to defeat at the hands of Amlin Challenge Cup semi-finalists Connacht.
It was an evening that was supposed to see Leinster secure top spot and a Play-Off berth but the Galway side ignored the script and inflicted a 27-13 defeat on Cheika's men.
Speaking after the game, Michael Cheika, who has named a youthful Leinster side for Friday's visit to Glasgow, said:
"Connacht have shown pretty convincingly all season that they are a good side, even in the game up in Dublin when we were lucky to win.
"I don't think that they're a bottom of the league team and we know that they have a lot of quality because we have coached a few of them ourselves.
"We lacked an edge in defence. We had a lot of possession but we didn't use it properly, but in the second half we attacked the line better.
"We worked hard, but it's another game that we have lost here because we lacked the correct attitude.
"Brian (ODriscoll) finished the game and he's fine, but Girvan (Dempsey) suffered a neck injury and we just have to manage our resources now with a game coming up against Glasgow on Friday."