Jurgen Klopp's Liverpool made a slow start to their game with Crystal Palace as the Eagles took the lead after twenty minutes.
The Merseyside club have begun the German's reign in good style; winning their last three games, but their performance in the first half against Palace was far from convincing. Although, Philippe Coutinho's goal drew the sides level.
Yannick Bolasie fired past Simon Mignolet on 21 minutes, after some fairly suspect defending, and fans on Twitter were quick to pin the blame on one Anfield star.
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Alberto Moreno has been in fine form going forward this season, but questions have always remained over his defensive ability.
Well, it was his frailty facing his own goal that ultimately cost the Reds in the early exchanges against Alan Pardew's side.
Moreno lost out in a 50-50 challenge with Bakary Sako in his own half before Wilfried Zaha's cross found its way to Bolasie.
German defender Emre Can was also at fault in the build-up to the goal, and that did not go unnoticed by Liverpool supporters.
A lot has been made of Moreno's ability in defence. It seemed Brendan Rodgers was not convinced. However, Klopp has given him a run in the side since arriving on Merseyside.
The modern full-back is often judged on their attacking ability, but they must still be able to fulfill their primary role.
With Joe Gomez and Jon Flanagan both injured, Moreno has very little competition on the left side.
However, when Flanagan returns from injury in December he is sure to push the former Sevilla man all the way.
One thing is for sure, he must improve his defensive work if he wants to stay in the starting line-up at Anfield.
Should Alberto Moreno play as a left-back or be pushed further up Jurgen Klopp? Let us know what you think by leaving a comment below