Aritz Aduriz hopes to end his Athletic Bilbao career by winning the Copa del Rey, admitting he had grown tired of watching Barcelona and Real Madrid "win everything".
Athletic knocked Barca out of the competition at the quarter-final stage last week thanks to a stoppage-time own goal from Sergio Busquets.
Madrid had earlier been defeated 4-3 at home by Athletic's Basque rivals Real Sociedad, marking the first time in 65 years that Spain's grandest two clubs had been eliminated from the Copa on the same day.