Braces from Martin Skrtel and Raheem Sterling, plus another strike from Daniel Sturridge, saw the Reds to a famous win over the side leading the way in the standings at the start of the day.
A number of errors contributed to the Gunners’ miserable afternoon on Merseyside, and the experienced Frenchman admitted to being concerned by what he saw from his players.
“It was a very poor day. We were poor defensively, offensively,” Wenger told BT Sport.
“Liverpool played very well, so congratulations to them. But it was a poor performance on a day when we couldn’t afford it.
“Of course it raises some questions today because we were caught many times and were naive.”
Asked how he would look to right the wrongs, Wenger added:
“Defensively we need to be more stable. Today we were too open. From the front to the back we were not at the level we are used to.”
It was a stunning start to the game by Arsenal who were four down inside 20 minutes and it could have been six or seven.
In that opening period, all of Arsenal’s defensive woes were laid open. Mert’s slow place, Arteta aging, Ozil disappearing again. Add in terrible marking once again at set pieces and this was a simply a terrible day at the office for the Gunners.
Fortunately, games are coming fast and furious at the moment with Arsenal playing Man United in midweek, so a chance to get back to winning ways.
One thing to keep in mind. Arsenal will start next week either one or two points out of first place. That puts the defeat into some sort of perspective.