Former Manchester City defender Vincent Kompany was confused at the manner of Liverpool's first goal on Sunday.
The Reds were 3-1 winners as the two teams battled it out at Anfield.
Kompany, who left City after last season, felt there was a hand ball from Trent Alexander-Arnold in the build up to Fabinho's opener.
"The incident happens and I'm confused," Kompany told Sky Sports.
"That's the problem. I'm confused. I'm thinking 'Okay, I'm not the expert in everything'. Then I look to my right at Jose Mourinho, Roy Keane and Graham Souness. We're all confused.
"Surely that says something about the process? The fact that this could still be for debate when there's a VAR system that is meant to make football simpler and fairer.
"[The] goal happens 20 seconds later. My feeling remains that although Liverpool were great, and both teams tried to play the way they are known to play, I felt this first decision was so important to get right."
