Arsenal manager Unai Emery is not changing his ideas regarding the club's defence.

Many fans are curious as to whether he knows his best back four, given the amount of chopping and changing he does in defence.

But Emery insists that his way of picking players is the correct method.

"We are improving defensively, we are conceding less goals. That's one objective we're [achieving]," the Spaniard said prior to Thursday's Europa League clash with Vitoria.

"But I don't want to achieve that best performance only with one system or with the same four players. In the Europa League we are using different players and they are also improving our defensive moment.

"It's for all the players. Above all, I want to continue to be an offensive team, but improve defensively.

"Our mentality is to be offensive. I am going to get that balance little by little, but now we are becoming a more competitive team, we are improving defensively and we want for the next step to be to keep our offensive capacity. I think we are going to do that.

"After Monday, we can be disappointed but we've got another chance in 24 hours."