Gunners boss Arsene Wenger, acknowledges that the loss of Robin Van Persie's goals has to be addressed if Champions League football is to be achieved next season and said he could make further signings were needed as his side lacked a cutting edge in the 0-0 draw with Stoke.
Arsenal have failed to score in their opening two Premier League games after van Persie's move to Manchester United.
"We always felt we were dangerous, but we couldn't finish it off. We have work to do in the final third," he said.
"We are active and there could still be action in the transfer market."
Arsenal have already signed French striker Olivier Giroud, German forward Lukas Podolski and Spanish midfielder Santi Cazorla, who was impressive at the Britannia Stadium.
Both Giroud and Podolski struggled to come to terms with the Premier League and failed to create many clear-cut chances.
"Defensively we were solid and dealt with the problems they wanted to give us, technically we were alright, but we still lacked some sharpness and accuracy in our passing and movement in the final third.
"I don't want to take anything away from Robin van Persie, he is an exceptional football player, but I still don't worry that we will score goals with the players we have.
"We lacked a bit of understanding of the players in the final third. We have many new players and you could see that something was missing."