Pellegrini insists they go into the tie full of confidence.
"It's a good chance to show how good we are," he said. "They have a lot of experience, they have a great team, they have the best player in the world but I think also we are a good team with good players.
"I don't have any fear about playing Barcelona because this team has got to continue to develop the mentality to play against important teams, whether that's in the last 16, the quarter-final. I hope we can win at home."