Aaron Ramsey admits Arsenal must change something following Sunday's drubbing at Liverpool.
The Gunners were swept aside with embarrassing ease as the ruthless Merseysiders thrashed them 4-0 at Anfield.
It was Arsenal's second successive Premier League defeat and left them, and manager Arsene Wenger, facing yet more searching questions.
Midfielder Ramsey told the club's website: "We're going to have to change something if we're to compete this year.
"Liverpool showed what it's going to have to take to compete for the Premier League and we're going to have to do something about it if we're going to do that. We're very disappointed with the way we performed."
Arsenal were comprehensively outplayed and their humiliation could have been greater were it not for several excellent saves from Petr Cech.
Roberto Firmino headed Liverpool ahead after 17 minutes and Sadio Mane scored a stunning second to double the lead before the break. Mohamed Salah robbed Hector Bellerin to race away for the third after 57 minutes and substitute Daniel Sturridge completed the rout.
The Gunners, whose only victory this term was a frenetic 4-3 defeat of Leicester, now have the best part of a fortnight, due to an international break, to take stock of their situation.
Ramsey said: "Most of the squad go away now, so when we get back we'll have to review that and hopefully we can move on and sort it out."
The manner of the defeat could reignite the protests against Wenger that created headlines and split fans last season.
Wenger signed a new two-year contract after winning the FA Cup in May but former Arsenal defender Martin Keown was among those to question the club's wisdom over that deal.
