The Reds were on the end of a 3-0 drubbing at Barcelona in the first leg of the Champions League semi-final in midweek.
Lionel Messi struck twice including a sensational free kick to leave the Reds staring down the barrel of another trophy-less season.
But Jurgen Klopp is refusing to lose hope yet and has told his players not to let their Premier League title challenge crumble at Newcastle on Saturday night.
When asked about his side’s mental strength at the climax of another enthralling season, the German said: “We have to prove it again.
“We didn’t have to pick up players at the late dinner in Barcelona when we were sitting around and give them a hug or whatever. That’s in us.
“In football, if you want to win, you need to accept that you can still lose. Again, the performance, the boys felt it on the pitch.
“We did some really good stuff there, we caused them problems. It wasn’t enough for that night because we didn’t finish it off.”
“Now, we go to Newcastle, and this situation we had the whole season, that there’s always the next one,” Klopp added.
“I don’t know when it started but probably the second or third match when three or four clubs won the first five or six I don’t know and each game was already like, ‘If you don’t win that then…’
“It was always we have to, we have to, we have to.
“That’s what we are really used to this year and that was a big, big step for us.”
Klopp believes his side have already erased the emotion of the 3-0 defeat from their heads ahead of the trip to Tyneside.
If they are still to reach Madrid for the final on Saturday, June 1, they will have to produce another famous European night at Anfield.
That cannot distract them though seeing as failure to win at St James’ Park would leave City on the cusp of retaining the title.
Klopp confirmed Guinea midfielder Naby Keita will miss the rest of the season and the African Cup of Nations after suffering an adductor injury at the Nou Camp.