Arsenal manager Arsene Wenger says causing a major upset at the Camp Nou tonight will be a "big boost" for his players ahead of the last part of the season.
The Gunners have the arduous task of overcoming a 2-0 deficit against Luis Enrique's men after Lionel Messi's brace gave the Spanish giants a comfortable lead.
But the Frenchman is convinced that his side is capable of causing the upset.
"We have gone through a disappointing spell recently, with our results, but it's important to stay calm and strong," Wenger said on Tuesday.
"I have played 200 Champions League games. We have won everywhere in Europe but not here yet. So we have the chance to achieve that tomorrow.
"I'm convinced that the players have decided and are united to give a strong response tomorrow and I'm convinced that a great result tomorrow would be a big boost for the rest of the season.
"[Recent criticism?] I built the club with hard work, without any external resources and, if you compare where we are today to when I arrived, we have moved forward and without any money from anybody, just the money we produced from the work.
"The problem when you're a long time somewhere [is that] you are questioned about your dedication, but I don't question my dedication at all and I give more time to my club now than when I arrived.
"I have no doubts about my huge motivation. I am even more motivated from the first day I arrived and feel the pressure and the responsibility to keep moving this club forward more now.
"I am honest enough to make sure that I give my best. I'm not too much an image person, I just want to think I give my best for this club and I'm determined to do that.
"Honest dedication and total commitment is the most important thing."
