Athletic Bilbao have appointed Edin Terzic as the club's new head coach on a two-year contract, and will be in charge of the Spanish side from next season.
The Catalans' 2-1 win over Osasuna at Estadio El Sadar on Saturday night means that they will be crowned champions if Real Madrid fails to beat Espanyol on Sunday.
Ernesto Valverde has confirmed he will step down as Athletic Bilbao manager at the end of the season, bringing an end to his third spell in charge of the Basque side and closing a defining chapter in the club's modern history.
Real Sociedad will face Atletico Madrid in the Copa del Rey final after securing a tense 1-0 Basque derby victory over Athletic Club at the Reale Arena, completing a 2-0 aggregate triumph.
Real Madrid remain just a point behind Barcelona in the race for the LaLiga title after both sides won at the weekend.
Barcelona delivered a dominant display to defeat Athletic Club 5-0 and secure their place in the Spanish Super Cup final, extending their impressive winning run.