The two sides meet in the Champions League on Tuesday.
The two sides meet in the Champions League last 16 on Tuesday, with the current holders heading to the Emirates Stadium for the first leg.
Not many are giving Arsene Wenger’s side a chance of success considering the Catalans’ current fine form and the fact they have only managed one win in the last seven meetings between the two sides.
Nonetheless, Barcelona are still wary of the Gunners, particularly Alexis Sanchez, and Iniesta has warned his teammates of his qualities.
“What makes Alexis so dangerous is that he is unpredictable,” he told arsenal.com
“When he dribbles, when he attacks, he is a very strong player. He’s got skill and when he has the ball he always creates doubts.”
“In that sense, we have to try to make him feel uncomfortable on the field and try to minimise his strengths.”
If Arsenal are to get anything from the game, they will certainly need their big stars such as Sanchez playing at the top of their game to do it.
In particular they will need Mesut Ozil firing on all cylinders and dictating the game as he has so often this season.
It has often been said of the German international that he does not show up in the big games as he should and helping his side to beat Barcelona would be the perfect way to end that debate once and for all.