Athletic Club sewed up fourth-placed in the Spanish Liga with two games to spare thanks to a resounding 3-0 success at Rayo Vallecano de Madrid.
First-half goals from Mikel San José and Óscar de Marcos established command for the visitors and a qualifying berth in next season's UEFA Champions League was confirmed when Ander Herrera added a third with 16 minutes remaining.
Six points clear of Sevilla FC at the start of play, Ernesto Valverde's men knew that victory would rubber-stamp fourth spot due to their superior head-to-head record against the UEFA Europa League finalists.
San José converted a Markel Susaeta corner on 20 minutes and when De Marcos (30) stabbed in following another set-piece, Athletic never looked back. Herrera's free-kick added further gloss against a Rayo side that could have moved up to eighth with a victory.
Athletic previously played in the UEFA Champions League in the 1998/99 season and fourth-place represents their highest league finish since ending 1997/98 as runners-up.
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|1||Club Atlético de Madrid||35||88|
|3||Real Madrid CF||34||82|
|6||Real Sociedad de Fútbol||35||57|
|9||Rayo Vallecano de Madrid||36||43|
|10||RC Celta de Vigo||35||43|
|19||Real Valladolid CF||34||32|
|20||Real Betis Balompié||35||22|