"We have got it out of our systems because our main frailty at Liverpool was that we conceded goal after goal in 20 minutes and on Wednesday night we came back to our usual defensive stability," he said.
The Frenchman also disputed that Liverpool would be the 'last team' Arsenal want to play at this time.
"No, I would say it is the first team we want to play. When you can put things right, you want an opportunity to do that and we have an opportunity."