Barcelona went a third straight match without a win on Saturday after they drew 1-1 at home to Athletic Bilbao, marking their second successive draw at the Camp Nou after being held by Girona last Sunday.
Lionel Messi was rested but came off the bench to set up a crucial 85th-minute equaliser for fellow substitute Munir El Haddadi after Oscar de Marcos bamboozled the Barca defence to volley in the opener.
The result lifts Los Leones one place to 15th in La Liga for the time being. Real Madrid, meanwhile, can clinch the league's lead outright if they can defeat Atletico Madrid at the Estadio Santiago Bernabeu later on Saturday.