Of course, the most attention-grabbing match is Barca vs Manchester United. As Barca gradually loses momentum in the league title race, Rijkaard will certainly want to give fans and the board an account at the end of the season, and the Champions League presents the best opportunity to do so. On the other hand, Manchester United has increasingly displayed championship form, with a powerful offense and solid defense making them a strong contender. This match is also a showdown between Cristiano Ronaldo and Messi for the title of the world's best player.