Our match prediction:
Athletic de Bilbao managed to beat Barcelona 5-1 on aggregate during the Spanish Super Cup. Playing such amount of games on short term will result in a bad start of the new season. The Barcelona players showed they need more time in order to get in optimal form. The long Champions League season and Copa America (for Bravo, Messi, Suarez, Neymar & Mascherano) is clearly showing it's marks.