Jurgen Klopp told his pre-match press conference about a story involving Borussia Dortmund from 2014 when his side lost 3-0 to Real Madrid in the first leg of a Champions League tie.
The German outfit lost 3-0 to a Real Madrid side that was able to boast the likes of Cristiano Ronaldo.
His players won the second leg 2-0 and created enough chances to score more but failed to do so.
His tale is both a warning and a guide for his Liverpool side as they aim to foil Barcelona’s ambitions of reaching their first Champions League final since 2015.
Klopp told the media: “My own personal little story is about Real Madrid, years ago with Dortmund.
“We lost 3-0 there but then at home we changed seven or eight positions and we won 2-0 and we should have won 5-0 without a shadow of a doubt. We were clearly the better side.
“But it was Madrid then and it’s Barcelona now. It’s a big difference. I don’t want to talk too much, but I have told the players that story.
“It doesn’t mean that it will happen again but it is enough for me to believe. That is what we do, not more.”
Liverpool need to score three goals to take the game into extra time but will require a fourth with no reply to win the tie and book their place in the final in Madrid.
Klopp’s story is a guide for Liverpool as he tells his players that they will have chances to beat Barcelona tonight and must take them.
The warning is that his players need to beware the consequences of missing their chances and allowing Barcelona the chance to beat them without a fight.
Lionel Messi is obviously a threat and arguably not as easily thwarted as you could say Cristiano Ronaldo is. One thing both players are the best at is making their opponents regret the mistakes they make in games.
Klopp will be without Mohamed Salah, Roberto Firmino and Naby Keita while Virgil van Dijk is also a doubt.
The players on the pitch will have no excuses, however, as they made their bed in Barcelona and will need to lie in it in Liverpool following the game at Anfield.
It’s up to them to write their own narrative this evening.