Athletic overcame Real Betis, 1x0, on Sunday, relating to matchweek 21 of La Liga. Before this matchday, Bilbao's team came from a draw, and Sevilla's team came from a win.
Iker Muniain scored the winning goal after 21 minutes, laid on by Óscar de Marcos, with a left-foot strike.
In the 84th minute, defender left the game early after seeing a red card.
After the result Real Betis are 8th in the table, with 29 points, while Athletic sit 12th place, with 26 points. In their next fixture, Bilbao's team will play away against Real Sociedad, while Sevilla's team will host Atlético Madrid.