Barcelona are now eight points clear of Real Madrid following their 2-1 win at Real Betis on Wednesday night.
Xavi Hernandez’s men survived a late scare to hold onto a mostly comfortable victory.
Alejandro Balde bombed forward and put in a brilliant cross for Raphinha to give Barca the lead.
Robert Lewandowski, who was back from a suspension, made it 2-0 with 10 minutes to go.
But an own goal from Jules Kounde set up a tense end to the game.
Real Madrid will be looking to cut the gap on Thursday night when they host Valencia.