First-half goals from Mikel San Jose and Oscar de Marcos put the Basques in control before Ander Herrera added a third 16 minutes from time.

Victory moves Athletic nine points clear of Europa League finalists Sevilla with three games to play, but their superior head-to-head record over the Andalusians means they now cannot be caught.

However, Ernesto Valverde's men will have one qualifying round to go through in August if they are to make it into the group stages.