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The Reds were cruising in their Champions League clash at Sevilla two weeks ago before a second half collapse saw them come away with just a point.
And despite racing into a dominant lead on Saturday, Klopp was worried about history repeating itself when Glenn Murray’s penalty reduced the score to 3-1.
When asked if the thought crossed his mind he said: “I would be lying if I said I didn't think 'yeah'.
“When you have it one time, unfortunately you need a little bit (again) to get completely rid of this feeling.
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“They had a big chance, then we make a counter-attack and score, boom. That's really hard to cope with for the other team.”
Liverpool boss Jurgen Klopp
“It's not that I thought it would happen 100 per cent. We were 2-0 up at half-time, made it 3-0 shortly after and usually that's it, especially how we scored it as well.
“They had a big chance, then we make a counter-attack and score, boom. That's really hard to cope with for the other team.
“Then they make it 3-1, and while it was not really insecure, it's not that I thought it couldn’t happen because a few weeks ago it happened.
“We needed this so we don't have that (Sevilla) in our mind completely.”
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Liverpool remain fourth in the Premier League and haven’t lost in any competition since October.
The Reds need a point against Spartak Moscow on Wednesday to guarantee qualification to the Champions League knockout stage, before they host fierce rivals Everton at Anfield on Sunday.