Ospreys head coach Steve Tandy was disappointed with his side's high error rate after they suffered a heavy 33-0 defeat to Munster in Cork.
Friday's loss saw Dave Kilcoyne (2), Darren Sweetnam, Ronan O'Mahony and Robin Copeland cross the line for an impressive Munster side.
The result sees the Irish province go top of the PRO12 standings while the Ospreys sit in third position before other rivals play on Saturday.
Asked about the disappointing scoreless evening for his charges, head coach Tandy told the Ospreys' official website: "I think that's one word to sum it up, yes. We are bitterly disappointed with our performance tonight. Munster got what they thoroughly deserved, as did we.
"We had one opportunity just before half-time that could have sent us in a bit closer, we put the ball up in the corner and didn't take advantage of it at the line-out. I think going in at 14-5, or 14-7 could have put a different complexion on it, but was it a reflection on how the half had gone? I'm not sure.
"We lost the first four line-outs on the bounce. Perform like that and you will always struggle to win a game. We couldn't win a set-piece. We couldn't get control of the ball but then in fairness, they picked out the back three and made life very difficult for us.
"We didn't collect any balls, we were second to any loose balls from the forwards which is unlike us so it was a disappointing night."
Tandy continued: "It's difficult to pick positives out of it. We are pretty raw at the moment and will need to look at this in detail to see where it went wrong but we were blown away in the opening quarter. We were able to steady it but never really built any kind of momentum. We never had any platform to create anything as anytime we got anywhere, we weren’t accurate. We put balls down, we made mistakes, errors of judgement and were punished.
"It wasn’t good enough, we know that, but we've got to react in the right way as it doesn't get any easier in this competition with Glasgow in a few weeks. It'll be this group of players again, and we'll have to be a lot better if we don't want to be feeling like this again."
On missing 12 players who are on international duty, Tandy added that it was no excuse for their showing at Irish Independent Park.
"Obviously it doesn't help but that's not the reason the scoreboard looked like it did tonight," he said.
"We had the same group of players last weekend and got a five try win over the Dragons so I can't stand here and moan about boys missing with Wales.
"The group coming out here had belief, we felt it was strong enough to do a job tonight, to put a performance in regardless of the scoreboard. We definitely expected more than that, regardless of players missing."