As has been Arsenal's blight over the years against the top clubs, you can never be sure which Gunners side will turn up - the one which produces moments of effortless skill or the one whose shoddy defending compels Wenger to ponder his future in North London - it just so happens to be that both aspects of Arsenal were on display against Liverpool within a span of 90 minutes.
In truth, his team have been frozen for years, preserved in aimless aspic whilst Liverpool and Tottenham usurp them in the Champions League.
"Arsenal were not in the game apart from 10 minutes".
Fourth placed Liverpool remain one point above fifth placed Arsenal after a Christmas cracker that underlined the qualities and problems with two teams who harboured title ambitions in August, but now trail way behind runaway leaders Manchester City.
The visitors suffered an early blow when skipper Jordan Henderson limped off with a hamstring injury.
The 25-year-old has made a historical start at Anfield, scoring 20 goals and providing six assists for the Reds since his record-breaking move from AS Roma last summer. Coutinho, responsible for the initial possession turnover, glanced a languorous header over Petr Cech to give Liverpool a well-deserved lead.
Also, Salah missed two gilt-edged opportunities shortly before halftime as Liverpool carved open Arsenal's rearguard with glee.
Arsene Wenger's side have also found the net in each of their last 23 Premier League home games, last failing to score in a 0-0 draw with Middlesbrough in October 2016.
Liverpool were stunned and the sky fell in on them when Ozil fired Arsenal in front after a superb back heel by Alexandre Lacazette to send the home crowd into delirium. Roberto Firmino received the ball on the edge of the area from Emre Can.
"We played frozen with fear and not at our level in the first half. It was a thrilling game", he said. "I am always saying I want to win titles here".
Few of the 59,000 present would disagree.