By Peter Staunton
Change at Barcelona has not come gradually this time and sporting director Andoni Zubizarreta knows that the Catalans are on the brink of major upheaval at the end of the season.
Barcelona are about to lose their captain and one of their vice-captains. Carles Puyol - as influential a team member as they come - and Victor Valdes - long thought of as one of the best goalkeepers in the world - are leaving at the end of the season. Puyol announced his intention to quit the team this week and that news was followed by the revelation that Barca's replacement for Valdes, Marc-Andre ter Stegen, is now firmly in place.