A day after beating Barcelona in the Spanish Super Cup, Athletic Bilbao and its fans celebrated in the streets of northern Spain with a sea of red overtaking the city.

Unbelievable images out of Spain show the fan support for the red and white club, who were dominant, beating Barca 5-1 on aggregate. 

Aritz Aduriz, the 34-year-old veteran forward, scored four of his team's five goals in the two-legged cup triumph. 

As for Bilbao's next match, that's against (you guessed it) Barcelona on Sunday in the first round of games in La Liga. 

fILE
A sea of red, a sea of happiness. (Twitter screengrab)