Preview of UEFA Champions League 2013:The competition for which the all the football fans all across, not only Europe but also the entire world, wait eagerly, the holy grail of European club football has returned. Yes, you have guessed it correctly. I am referring to none other than The UEFA Champions League. Europe is well known for its famous domestic leagues and very high profile clubs who play in those leagues. But the charm of the Champions League or The European Cup, as it was called earlier, is something extraordinary.