Arsène Wenger says his side will have to think deeply about the disappointing result against Chelsea and make sure they respond in the right way against Swansea City.
Arsenal now trail Jose Mourinho's side by seven points at the top of the Premier League with Liverpool and Man City also moving clear of the Gunners at the weekend.
Wenger was puzzled by his team's display at Stamford Bridge but insists he takes full responsibility for it.
What is important now is we show we have the capacity to respondArsène Wenger
"We have to think deeply about because it is not the first time [it's happened]', Wenger said. "It all went wrong and I take full responsibility. It is my fault that we failed completely today because we did not turn up.
"We felt we prepared properly, but we did not turn up, so it is puzzling. After 20 minutes, it was game over and it became a long afternoon, a long dramatic, dreadful afternoon. There is not a lot more I could say, you could blame and blame but it does not help.
"That is the most disappointing thing, that we were never in the game. This is puzzling because we were shocked and knocked down basically without feeling you have had a chance.
"What is important now is we show we have the capacity to respond, despite that disappointment, on Tuesday night."Copyright 2016 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source