Both sides hit the woodwork in an end-to-end first period, but the score remained level at the interval.
Read how it all unfolded in Sports Mole's minute-by-minute live commentary of the action below.
BARCA: Pinto; Alves, Mascherano, Bartra, Adriano; Xavi, Song, Iniesta; Alexis, Messi, Pedro
BILBAO: Iraizoz; De Marcos, San Jose, Laporte, Balenziaga; Iturraspe, Moran, Herrera; Susaeta, Aduriz, Muniain
El Camp Nou listo para el partido de esta noche pic.twitter.com/UxGztxHFTB— Athletic Club (@AthleticClub) April 20, 2014
9 - Barcelona have won their last nine home league meetings with Athletic; their best ever home run against the Basque side. Classic.— OptaJose (@OptaJose) April 20, 2014