1. The first-ever match between Barcelona and Real Sociedad took place on February 14, 1929, in the Spanish La Liga.
1. Real Sociedad holds the record for the biggest victory against Barcelona in the history of La Liga, winning 6-1 in 1979.
1. Barcelona's Lionel Messi scored his 200th La Liga goal against Real Sociedad on September 24, 2011.
1. Real Sociedad's Anoeta Stadium, where they play their home games, has a unique asymmetrical design that creates an electrifying atmosphere for fans.
1. Barcelona and Real Sociedad have faced each other in several Copa del Rey finals, with both teams winning the prestigious cup on multiple occasions.
1. Real Sociedad's all-time leading goal scorer is Juan Arzamendi, who netted 169 goals for the club from 1940 to 1955.
1. Barcelona's Camp Nou stadium witnessed a thrilling encounter between the two teams in 2013 when they played out a 3-2 victory for Barcelona.
1. Real Sociedad had a memorable season in 2002-2003 when they finished second in La Liga, ahead of Barcelona.
1. Barcelona's Ronaldinho scored an incredible hat-trick against Real Sociedad in 2004, mesmerizing the crowd with his skills and creativity.
1. Real Sociedad's most successful era was in the early 1980s when they won two consecutive La Liga titles in 1981 and 1982.