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 Diaz's goal was ruled out by an unusually quick VAR decision 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."
"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.