Betis Deportivo Balompié enter the Copa del Rey. Additionally, only under-23 players or under-25 players with a professional contract can switch between senior and reserve teams. Founded in 1963 as "Triana Balompié" and named after a working class district in Seville. Legend has it that Betis, later to evolve into Real Betis, was formed in 1913 by a group of Sevilla FC directors after the club refused to sign a player who came from Triana. In 1976, the team was renamed as "Betis Deportivo" and started to compile an impressive record in the Spanish U-19 Cup, winning the competition in 1983, 1990, 1998
Real Betis falling almost consecutively until consolidating their place in the top level in 1974–75. On 25 June 1977, Betis played Athletic Bilbao at the Vicente Calderón Stadium in the Copa del Rey final. The match finished 2–2, with Betis winning 8–7 after a staggering 21 penalties taken. This rounded off a solid season in which the club finished fifth in the league. After that triumph, Betis competed in the European Cup Winners' Cup: after knocking out Milan 3–2 on aggregate in the first round, the side reached the quarter-finals, where they lost to Dynamo Moscow. Despite their strong performance in Europe,