Editing Athletic Bilbao (section)

=== Real Madrid and Barcelona ===
{{main|El Viejo Clásico|Athletic–Barcelona clásico}}
Against [[Real Madrid CF|Real Madrid]] and [[FC Barcelona|Barcelona]], Athletic has competed for many league and cup titles throughout its history.<ref>{{Cite web |last=MARCA.com |date=2015-08-18 |title=El Athletic logra su segunda Supercopa |url=https://www.marca.com/2015/08/18/futbol/equipos/athletic/1439849629.html |access-date=2024-03-19 |website=MARCA.com |language=es}}</ref><ref>{{Cite web |title=Athletic-Barça, el otro clásico de nuestro fútbol - Marca.com |url=http://archivo.marca.com/edicion/marca/futbol/1a_division/barcelona/es/desarrollo/1176332.html |access-date=2024-03-19 |website=archivo.marca.com}}</ref><ref>{{Cite web |date=2012-11-18 |title=El Athletic se queja de insultos desde las gradas del Bernabéu a Susaeta y Gurpegi |url=https://www.20minutos.es/deportes/noticia/real-madrid-athletic-susaeta-1650861/0/ |access-date=2024-03-19 |website=www.20minutos.es - Últimas Noticias |language=es}}</ref> Athletic has recorded the most victories against both opponents (79 wins over Barcelona and 76 over Madrid, as of 2024), ahead of the likes of [[Atlético Madrid]], [[Valencia CF|Valencia]], [[Sevilla FC|Sevilla]] and [[Real Sociedad]].<ref>{{Cite web |title=El votante del PP es el más aficionado a los toros, la siesta, la colonia y las rubias {{!}} elmundo.es |url=https://www.elmundo.es/elmundo/2008/02/19/eleccionesgenerales/1203416455.html |access-date=2024-03-19 |website=www.elmundo.es}}</ref>{{citation needed|date=April 2025}}