Arsenal manager Unai Emery insists his side have a collective responsibility to improve defensively after throwing away a two-goal lead against Watford, pointing out that the club have been sitting too deep when they're out of possession.
The Gunners faced 31 shots at Vicarage Road last week and made a handful of defensive errors, highlighting the club's weaknesses at the back which have also flared up in matches against Liverpool and Tottenham.
Arsenal's back four will be boosted over the next few weeks as Rob Holding, Héctor Bellerín and Kieran Tierney return from injury, but Emery insists that the club still have to improve collectively when defending.