Jurgen Klopp has criticised the role of VAR in Liverpool’s defeat to Napoli.
The European champions became the first side since AC Milan in 1994 to lose the first game of their defence with Tuesday’s 2-0 defeat at the Stadio San Paolo.
An even-sided game swung in the hosts’ favour when Andy Robertson conceded a penalty of a foul on Jose Callejon which was subject to scrutiny under VAR.
However the decision by referee Felix Brych to award the spot kick against the Reds defender was not deemed to be a ‘clear and obvious error’ upon review.
That ruling perplexed Klopp, who believes the technology’s use still lacks clarity.
He said: “It’s a decision made by human beings. The rules say if it is not a clear mistake and it’s still humans who decide if it’s a mistake.
“I think it [VAR] will help in the long-term but as long as human beings make the decision there is still potential for failure. We are all like this.
“What can I say? The rules are like this, and they’d have to adjust the rules.
“The German [refereeing] team, they do it for a while already, the VAR was also German, they have been using it longer than others.
“They will find an explanation about why they did the right thing, that’s how it is. If he didn’t whistle for the penalty he wouldn’t have been overruled by VAR.
“We all wanted to have more clarification in these things, now we don’t have it.”