Liverpool were shockingly beaten 2-0 by Red Star Belgrade on Tuesday night in the Champions League.
It was one of the Reds’ worst performances of the season so far, and leaves things very much in the balance now in terms of qualification for the last 16.
Liverpool are second in their group behind Napoli although the sides have the same number of points.
Breathing down their necks are Paris Saint-Germain, and even Red Star now have a chance to progress.
It was supposed to be an easy six points against the Serbian outfit, but the Reds have taken just three.
Alarmingly for Klopp, his midfield was particularly weak last night.
Zero successful tackles is a major concern
The midfield three of James Milner, Adam Lallana and Gini Wijnaldum failed to make a single successful tackle between them at Rajko Mitić Stadium, via The Liverpool Echo.
That is unheard of, especially for a Liverpool team that has been so tenacious in recent times.
Last term, when the front three weren’t busy scoring so many goals, the rest of the team were getting praise for their aggressive pressing and tackling, especially in midfield.
It would appear that Liverpool have lost some of that bite that made them so impressive last season.
That lack of bite arguably allowed the second goal to happen, with Wijnaldum letting Milan Pavkov fire in from the edge of the box unchallenged.
It is something that hasn’t been as prominent with Liverpool this season, and it could be the thing that lets them down at the vital moments.