The defending champions came from behind to beat Sheffield United 2-1 after going behind to another contentious ruling.
Just seven days after the Reds wrote to the Premier League for an explanation of two referrals by David Coote in the Merseyside derby, the video assistant – this time Andre Marriner – found himself in the spotlight again.
“There is lots of disappointment in our dressing room. We got on the bus believing we could get a result and we get back on the bus disappointed we haven’t got that.
“To be involved in a tight game I think my assessment is not far off.
“They had more possession, more control but I didn’t think it was one-way traffic and that is the disappointing aspect from tonight.
“But we’re not feeling sorry for ourselves, there are no white flags going up. It is ruthless and cruel this division and it is hard one to take tonight.”