Manchester United manager Louis van Gaal admits his players were very disappointed after crashing out of the Europa League.
The Red Devils failed to overturn the 2-0 defeat suffered at Anfield as they now have to finish in the Top Four to feature in next season's Champions League.
And the Dutchman says the focus will now be immediately shifted to Sunday's derby against Manchester City.
"It is very disappointing because we had the chance – that's the feeling in the dressing room," van Gaal explained.
"We created enough chances – [Jesse] Lingard missed with his head, [Juan] Mata from eight metres, [Anthony] Martial also, but the way we conceded that goal, in the last seconds of the first half.
"If we didn't concede that goal, it was possible. In the second half, we also had chances – [Marouane] Fellaini with his head, with his foot. But you have to score three goals and that's not too easy.
"[But] you have to give credit to [Philippe] Coutinho. It was a fantastic action. We can also say that we had fantastic actions but you also need a little bit of luck.
"But when you say that too much as a manager it's not good. We were 1-0 ahead and we created a lot of chances to be 2-0 already, then we conceded a goal. We didn't score there so it is then very difficult. The difference in the dressing room was big – Liverpool were relieved, I think, because we played the same way they played in the first half at Anfield.
"We tried to do everything. We fought until the end. At half-time, the players were so disappointed but, still, we have given everything. I was very pleased the fans were also seeing that and gave them a big applause after the match.
"[Now] we have to cope with it.
"We have to recover again after this match. The players have given everything - more than everything, I think – but still we have to play against Manchester City, which is a more important game now because it's about qualification for the Champions League.
"And they have one [recovery] day more but that was also the case against Arsenal and we beat them, so we have to believe in it. We can do it but it's our fifth or sixth game in two weeks."