Racing de Irún
Athletic de Bilbao
10 (2 per match)
The 1913 Copa del Rey were two different competitions held the same year.
Due to disagreements between the Royal Spanish Football Federation (Spanish: Real Federación Española de Fútbol, RFEF) and some clubs, in 1913 two parallel competitions were held: an "official", organized by the FEF (Federación Española de Fútbol), in Madrid and an "unofficial", organized by the UECF (Unión Española de Clubes de Fútbol), in Barcelona. Both are currently recognized as official by the RFEF.
1913 Copa del Rey Wikipedia
The competition started on March 16, 1913, and concluded on March 23, 1913, with the Final, held at the O'Donell, Madrid, in which Racing de Irún lifted the trophy for the first time ever with a 1-0 victory over Athletic Bilbao.
Three teams were going to take part in the tournament, but Pontevedra CF withdrew before the start of the tournament.