Manager Jurgen Klopp admits that inconsistency is unacceptable and the quality of his squad is partly to blame for that.
"It is obviously the case we are inconsistent," he said after the 3-1 win at Anfield. "I know we don't have to doubt the attitude, and the kind of attitude we usually are looking for was here against Arsenal. They were really motivated and you cannot play like this if you have any issues, but we struggled in other games.
"So, OK, you say it is about quality and sometimes probably we don't have the quality, but with quality you have potential, and you make quality with work and all that stuff."
Saturday's result temporarily lifted Liverpool back up to third place in the table, before Manchester City's win at Sunderland knocked them back into fourth, two points ahead of Arsenal but having played one game more.