Barcelona may have entered the pantheon of European football's greatest teams, but coach Pep Guardiola is keeping his feet on the floor following Saturday's destruction of Manchester United. Barcelona lit up Wembley with one of the great performances here Saturday, mesmerising United with a bewitching display that left the English champions grasping at shadows en route to a 3-1 defeat. It was the Spanish side's second Champions League triumph in three years and confirmed the view of many pundits that Guardiola's men are the greatest club side football has ever seen.