Ospreys coach Sean Holley admitted his side were taught a lesson in their 43-9 Heineken Cup defeat at the hands of Munster.
Holley, who took over the region in a caretaker capacity at the start of the season, saw his dreams of taking the Swansea-based team to its first ever semi-final go up in smoke after Filo Tiatia's sinbinning in the 25th minute for illegally blocking a run by Paul Warwick.
"The only thing I can say is that today we were taught a lot of lessons and come second best in every facet of the game, both on and off the field," said Holley.
"We've been well beaten by a champion team. We have to give them a lot of credit. We're very disappointed. It's been a very painful experience.
"We went into a quarter-final with huge hopes. We've prepared the best that we can.
"Whenever we play Munster, it's normally close. But it was never close. From the time we conceded a try when Filo got a yellow card, there was only going to be one team in it. Fair play to them, they ran away with it."
England flanker James Haskell insists he will be pushing as hard as possible to be back from a toe injury in time to make his case for a spot in Eddie Jones' side looking to defend their RBS 6 Nations title next year.