A strange little side quest
Here is a rabbit hole for the next loading screen in El Clásico: The first penalty shoot-out in World Cup history came in the 1982 semi-final between West Germany and France. There is another connection worth keeping in the same mental pocket: Archery was already on the Olympic programme in 1900, boxing joined the modern Games in 1904, and basketball became a medal sport in 1936. That gives El Clásico a little more company than it first appears to have.