"The main difference is how we're defending when we're attacking", he said.
Bournemouth and Arsenal have been operating at very different ends of the football pyramid over the years but Sunday lunchtime's Premier League fixture sees the team ranked sixth in the table host the side now occupying fifth place.
While Unai Emery claimed that Lacazette would be available at Dean Court earlier this week, there was no place for the Frenchman in Arsenal's 18-man squad.
"Before coming Wenger, Arsenal celebrated the 1-0 and was based on defensive solidity". Arsenal have somewhat slipped in the standings and now sit 5th courtesy some disappointing results which have seen the Gunners drop six points in the last three games.
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"But over time, only technical quality and offensive freedom were taken care of, losing the defensive structure", the Spaniard added. Arsenal was in a decline. We had to stop it and start climbing.
After Bouremouth, Arsenal will travel to Ukraine to face Vorskla on Thursday before the North London derby just three days later.
Emery provided an update on the status of the quartet when he spoke to the media as the game approached. "I am knowing every day, the competition better".
Emery also revealed a "third objective" of transmitting a "connection with the fans", who were so divided under towards the end of Wenger's tenure. "The first step we need to do is get back into the Champions League and then we need to start competing and then we need to start winning the biggest trophies in the game". "Within that we want to see individual footballers growing and developing". But Sunday is another test, and a big test against a team that are behind us. "We want Arsenal to convey energy and hunger".