Liverpool tasted defeat in Naples for the second consecutive season last night.

The Reds' opening game of the 2019/20 Champions League campaign saw them put in a valiant performance in Italy, but one that ultimately saw them succumb to a 2-0 defeat.

A penalty from Dries Mertens and a late strike from former Tottenham man Fernando Llorente sealed a famous win for Carlo Ancelotti's exciting side.

However, many Liverpool fans were left fuming after the dubious nature of the penalty awarded to Napoli late in the game.

Spanish winger Jose Callejon appeared to be on his way down to the turf before contact was made by Liverpool left-back Andrew Robertson in the box.

But even after a VAR review, the spot kick was awarded and Mertens done the rest, firing the ball past Adrian.

It's a decision which adds yet more doubt to the efficiency of VAR and Reds boss Jurgen Klopp was understandably upset by the incident.

In fact, the German made it very clear that he believed Callejon dived to con the officials.

Klopp said after the game, per Mirror: “That was the game-changer tonight.

“I’m sorry, but when the player jumps before there is contact then it can not be a penalty. I can say a lot of things about it, but then it would look like a bad loser.

“When you see it again, you can see it is a clear mistake. But then human beings are the ones who decide if there is a mistake - and with VAR as long as human beings decide, then there is a potential for failure.

“But we can not do anything about it now. We have to accept it. They will find a reason to say it was the right decision, and we have to accept it.”

At the end of the day, Klopp and his men can't waste time dwelling on a situation that cannot be reversed.

The Reds now have to regroup and refocus ahead of Sunday's difficult trip to Chelsea in the Premier League, as they look to build on their unbeaten start.