Leaders Barcelona threw a two-goal lead away as late strikes from Lucas Perez and Alex Bergantigave Deportivo La Coruna a 2-2 draw in La Liga on Saturday.
A Lionel Messi free kick and a fire strike from Ivan Rakitic put Barca in control but they dropped quality in the closing stages and the visitors took advantage.
Messi curled the ball into the top corner of the net from 25 metres to break the resistance of a well-organised Deportivo team after 39 minutes.
Rakitic then fired home from a similar distance in the 62nd minute before in-form Lucas pulled a goal back after 77 and Bergantinos equalised four minutes from time.
It was the second successive draw in the league for Barca who have 35 points from 15 games. Surprise packages Deportivo are sixth on 23.
Second-placed Atletico Madrid, on 32 points, host Athletic Bilbao on Sunday when Real Madrid, third with 30, have a tough match at Villarreal.
“It is difficult to explain,” Barca midfielder Andres Iniesta told reporters. “We lost control when we needed to keep it and made it easy for the opposition at 2-0.
“These things happen and we will analyse it and try and make sure it doesn’t happen again.”
Support InfoStride News' Credible Journalism: Only credible journalism can guarantee a fair, accountable and transparent society, including democracy and government. It involves a lot of efforts and money. We need your support. Click here to Donate