Mikel Arteta likened Arsenal's 5-1 defeat to Liverpool to the scene of "a car crash".
The Gunners have an instant opportunity to make amends against Manchester United on Wednesday before playing Liverpool again in the FA Cup.
"We have to react," he said. "We know we need to improve and face those games in a different manner because after 18 minutes here we were 4-0 down and it was like a car crash.
"The manager was really upset at half-time because it wasn't good enough for this football club. It was the angriest I have seen him."
Arsene Wenger, whose miserable afternoon was compounded when he had a fall at Liverpool's Lime Street Station on his way home, said: "We were feeble in every important domain of playing at the highest level: concentration, strength in the challenge, and naivety. We have to ask questions of ourselves about this. We'll see a different Arsenal side on Wednesday night."
Wenger will not discipline either Per Mertesacker or Yaya Sanogo for a training-ground incident two weeks ago that left the Germany centre-back with a black eye.