It looks like Barca got lucky with the draw today as it looks as though Schalke are the weakest team in the draw but they have to be careful as it won't be an easy tie. I think Manchester United are the toughest team for Barca because they are the team in form at the moment where as Arsenal have been struggling with injuries and I don't think Chelsea or Liverpool have been so convincing. It will be an interesting game for United though against Roma but Barca can't afford to look any further ahead than the Schalke game.