Barcelona midfielder Cesc Fabregas believes that attitude had nothing to do with his side's defeat to Ajax in the Netherlands on Tuesday.
"We did plenty of running, it was not a question of the wrong attitude or a lack of commitment - it just didn't work out," UEFA.com quotes him as saying.
"During half time there was no panic, we spoke a lot about our positioning and how we could improve it, but we still weren't able to turn the game round in the second half.
"We have no excuses - the level of performance was simply not high enough for Barcelona."
Barcelona have already qualified for the last 16 of the Champions League from Group H.