Barcelona coach Quique Setien admits their title defence is out of their hands after drawing 2-2 at Celta Vigo.
Real Madrid can now go two points clear at the top of the table when they play Espanyol on Sunday.
"It's true that we had a two-point lead 11 matches ago and now, as long as our rivals win, they'll have that advantage," Setien said.
"We've got little margin for error now and, in theory, we have to win all our games and hope our rival slips up.
"We'll try to keep picking up maximum points.
"We'll see if we have a bit more solvency in some aspects that make things easier for us."
