Updated: Dec 31, 2018
Arsenal legend Martin Keown bemoans his former side's performance after they were beaten 5-1 at Anfield.
The north London side took the lead via Ainsley Maitland-Niles in the 11th minute before Roberto Firmino's hat-trick, and goals from Sadio Mane and Mohamed Salah put Unai Emery's Gunners to the sword.
However, after the match Keown highlighted a moment that he didn't like while speaking on BT Sport 1.
The Presenter Jake Humphrey said: "We could sit here till about 10 o'clock Martin going through your frustrations with the Arsenal performance today.
"One of the things you did notice really early on was how vocal Emery is on the sidelines and you said at one point 'it feels like you're not in control of your own game if the manager is giving you information out there'."
The former centre-back responded: "Look, we've got to be patient, but we have to be honest.
"He (Emery) was screaming at [Ainsley] Maitland-Niles to get back, now OK, there is little time between the matches but a simple instruction like that could have maybe been covered before the game starts.
"It always seems that he's not pro-active, he's reacting to a difficult situation that he finds himself in.
"There are a succession of injuries, and I think he is an outstanding manager and I think it was right to make that change.
"But at the moment, until he buys players - he's going to have to go out there and buy personnel - you look at them collectively, they don't defend well as a unity, they don't press, they don't get out together as a group."
Arsenal versus Liverpool is now the highest scoring fixture in Premier League history (155 goals).
Arsenal conceded four goals in the first half of a Premier League game for the fourth time, with Liverpool responsible for two of those (Feb 2014 and today, as well as Man Utd in Feb 2001 and Chelsea in March 2014).
Liverpool are now unbeaten in 31 Premier League games at Anfield (W22 D9), their joint-longest ever unbeaten home run in the competition, having also gone 31 without defeat between December 2007 and August 2009.
Arsenal are now without a win in their last 20 away league games against fellow "big-six" opposition (D7 L13), losing 10 of their last 12 such matches (D2).
Roberto Firmino has been directly involved in 11 goals in his eight Premier League games against Arsenal for Liverpool (8 goals, 3 assists), more than he has against any other opponent in the competition.
Roberto Firmino's hat-trick is the sixth to have been scored in fixtures between Arsenal and Liverpool in the Premier League - the most hat-tricks in a single fixture in Premier League history.