Cesc Fabregas, Arsenal's most influential player, sometimes gives the impression that he is on sabbatical in London, sharpening his game for when he returns to the Barcelona club he left as a 16-year-old.
"We know they are the best team in the world and it is a big task for us but we will do our best," Fabregas said in a lukewarm war-cry hardly likely to get the fans jumping.
Asked about the lessons of last season's 6-3 quarter-final hammering by the Spaniards, Fabregas said. "It's difficult to learn. They are such a good team, they have so many quality players that can make the difference. They were great last year, they played us at our own game and they were brilliant".
Wenger's ideal side is one full of short, skilful players with a great touch, wonderful vision and the ability to pass all day - just like Barcelona.
Arsenal's intricate passing, though too-often overcooked in and around the area, is usually enough to find a hole in Premier League defences.
"In the first half we gave Barcelona too much respect and we were lucky to get away with it," he said of the first leg when Arsenal trailed 2-0 but fought back to draw 2-2.
Lionel Messi's four goals in the second leg ended Arsenal's interest but Barcelona found things much tougher in the semi-final against Inter Milan. The Italians sat deep, allowed their opponents to pass themselves to sleep and swarmed all over them whenever they approached the box.
"The question at the Nou Camp is 'will we change the way we play?' but here we will try to play to our strengths. We will try to attack the other team," he said before his side's 11th successive foray into the knockout phase.
"If we play in the final third defensively, it will not be our game. We have matured from last year so it is important we play with belief."
Wenger said he was unlikely to take a "crazy gamble" on Samir Nasri, who has just about recovered from a hamstring strain but does seem likely to throw young midfielder Jack Wilshere in for the toughest test of his fledgling career.
With Arsenal also going well domestically, four points behind leaders Manchester United, Barcelona forward Pedro, one of eight Spanish World Cup-winners in the Catalan club's squad, said he expected an attractive and open game.
