A curious fact. Real Sociedad have only won three times in the Barça fiefdom in their entire history. And in two of them he made a corridor. Their first victory dates back to May 20, 1979 (1-3). That day, the pupils of Joaquim Rifé had just won the first Cup Winners' Cup in the history of the club, the mythical one played in Basel against Fortuna Düsseldorf. His last triumph dates from May 18, 1991. Also 1-3. Johan Cruyff's Barça, the 'Dream Team', had won its first league title the previous day. Tonight may come the fourth victory in the third aisle.