Atletico Madrid failed to consolidate second place in La Liga after falling to a 3-0 defeat to Real Sociedad at the Anoeta Stadium on Thursday (Apr 19).
Barcelona are one win away from a 25th Spanish league title after Atletico Madrid lost at Real Sociedad. Diego Simeone's side were second best throughout and fell behind when Willian Jose turned home a cutback by former Manchester United winger
Adnan Januzaj. Substitute Juanmi made it 2-0 late on when he drove in before getting his second in stoppage time with a chip.
Barcelona will win the La Liga title with victory at Deportivo La Coruna on Apr 29.
Barca finished second last season, three points behind rivals Real Madrid.
Second-placed Atletico, who are 12 points behind Barcelona with five games remaining, travel to Arsenal in the first leg of their Europa League semi-final on Apr 26.