Roura will be on the bench at San Siro tonight in the absence of Tito Vilanova.
"Are Barcelona favourites? You know the way I see it," he grimaced.
"Milan are a great team and it is not easy to play against them. The qualification will be decided in Barcelona. You cannot talk about favourites in a tie like this.
"In recent games we have been conceding goals, but fortunately we always scored a few more. We have tried to resolve certain situations in defence, as you can't always fight back to win.
"Everyone wants to get through to the quarter-finals, but we know it won't be easy. The Champions League is missed by Barcelona and the players are happier when they can face big clubs."