There's no doubting the potentials of Xavi Hernandez's Barcelona and how outstanding they can be against against their opponents in not just domestic matches but also in European scene.
But I think Real Madrid will be careful and calculative than they were last season. Madrid would definitely work on those factors that made them to lose the Spanish La Liga title to Barcelona last season and the fact they have added more few quality players in the squad gives them an edge over the La Liga rivals
I guess what caused Real Madrid losing in the last season is for the fact that they were more focused on winning the championship believing that the local league Spanish La Liga will be a workover for them even though they know the capacity of their closest rival team Barcelona who made a surprising ending to topping the table in the la luga.
But then also we can't tell if the coming season will be that lucky for Barcelona because Real Madrid is presently putting in efforts to get the best player onboard the team against the coming.