Luis Diaz's goal should have given Liverpool the lead, but VAR failed to intervene despite reviewing the footage, and the linesman's original incorrect offside decision was allowed to stand

Referees’ body PGMOL has admitted the decision to disallow Luis Diaz’s goal in nine-man Liverpool’s 2-1 loss to Tottenham Hotspur was “a significant human error”.

At 0-0 and with the Reds a man down, Liverpool winger Diaz’s goal was ruled out following an unusually quick video assistant referee (VAR) check by Darren England, in which the customary offside line graphic was not shown.

“PGMOL acknowledge a significant human error occurred,” the statement read. “PGMOL will conduct a full review.”

It continued: “The goal by Luiz Diaz was disallowed for offside by the on-field team of match officials. This was a clear and obvious factual error and should have resulted in the goal being awarded through VAR intervention, however, the VAR failed to intervene.”

BBC Sport understands the correct procedure was followed for the controversial decision but the mistake was down to human error.

The lines were drawn in accordance with normal procedure and every other aspect was checked.

However, what is being described by sources as a lapse of concentration led to a loss of focus around the initial on-field decision and then a ‘check complete’ being confirmed rather than an intervention which would have resulted in the goal being awarded.

It is understood referees’ chief Howard Webb has spoken to Liverpool this evening.

The Reds also had Curtis Jones and Diogo Jota sent off, and lost to a stoppage-time Joel Matip own goal after resolutely keeping Spurs out.

Speaking after the match, Jurgen Klopp said his side’s defeat came in “the most unfair circumstances” with “crazy decisions”.

“That is not offside when you see it,” he told Sky Sports.

“The ball is between Mo [Salah]’s legs, they drew the line wrong and didn’t judge the moment when Mo passed the ball right.”