Liverpool have asked referee body the PGMOL to explain two decisions at the weekend, which they feel were spectacularly wrong despite the scrutiny of VAR.
The club has officially written to Professional Game Match Officials Limited, who represent all officials in the Premier League, asking for a full explanation over two incidents, which were the subject of a full VAR review.
The first - at a crucial point in the game with Aston Villa - came after referee John Brooks and his assistant had allowed a goal scored by Cody Gakpo to stand. But after several minutes of examination from VAR Nick Greenhalgh, Brooks was asked to review the decision on the pitch-side monitor, and he overturned his original call to disallow the goal.