However, former referee Gallagher agreed with Klopp that the Arsenal skipper should have been penalised for the handball.
"I do agree (that a penalty should have been awarded)," Gallagher said.
"When I first saw it, I thought he was slipping. I can understand the referee on the pitch not giving it. The VAR felt that, with the subjective nature of handball, he thinks he is slipping and his arm is coming in. If you see that last picture, it looks as though he moves towards the ball, and I think the more acceptable decision would have been a penalty. I could hear them speaking. I heard him say back to Chris Kavanagh that, 'he has slipped and his arm is coming in towards his body, and he is making himself smaller'."