Liverpool only managed to accrue two points from their opening group stage fixtures against Sevilla and Spartak Moscow respectively and now lie second in their group having scored more goals than the Russian outfit, who have also drawn both of their group games.
Two points from their opening two matches is not what Klopp would have expected, especially after conceding a winning position late on at home to Sevilla in their opening game.
"I need to think about this and not about giving anyone Champions League experience or whatever", Klopp said in response to a suggestion he might have included Ben Woodburn - again in Steven Gerrard's under-19s squad - in the senior squad for the first time.
Due to Klopp's rotation policy Karius has not played since then but needs to put in a dominant, confident display in order to prevent more questions about his suitability for such high-profile games.
Liverpool have drawn four of their last six UEFA Champions League matches (includes qualifying). They haven't reached the knockout stages of the competition since 2008/09.
"The two games we saw of Maribor were different".
"I would say there has been no consistency until now". I don't think they have changed much in their approach of sitting in and playing on the counter-attack, which they did against Celtic a couple of years ago.
"So far it has been okay but not what we know he is able to do".
He reflected upon Maribor's creativity which requires Liverpool "to be concentrated" at the back, declaring: "In some moments they will be compact and together, we have to do the same". I think this will be another tough night for Liverpool.
"It was very good, I liked it", Klopp told Liverpool's official website - his side having won one of their last eight matches in all competitions.