The Gunners boss insists another win in Europe can only improve his players' confidence and claims a new-found defensive resolve is key to this season's improvement.
"We're better, we have a lot more defensive maturity particularly," he said. "We have also been able to overcome more difficult times during matches.
"I think we're perhaps not playing that well because opponents are more organized against us. I think it's important to play our game even if opponents are well-organized."
Wenger also made sure to dispel any ideas that his team is failing to control matches on the grounds that its traditionally dominant possession statistics have dropped in recent weeks.
"Against Southampton they had a lot of ball possession but in their own half of the field and very little in our final third, so it's an illusion, these possession statistics," he said.
"The right balance in ball possession is progression and you can see it in Tottenham and Manchester City, where Tottenham actually had more ball possession."