Referees' chief Howard Webb says Liverpool should have been awarded a penalty in their 1-1 draw with Arsenal for a Martin Odegaard handball.
Mohamed Salah's flick-on hit Odegaard's hand in the penalty area in the first half at Anfield on 23 December.
Referee Chris Kavanagh did not award the hosts a penalty and the video assistant referee (VAR) reviewed the incident and confirmed the decision.
"The game expects a penalty in this situation. I would agree," said Webb.
When the incident happened, Kavanagh said: "No, his hand's on the floor. His hand's on the floor.