Adnan Januzaj scored, but Real Sociedad missed the chance to close the gap on the European qualification places in La Liga after being held to a 1-1 draw by Levante at Anoeta on Friday night.
Borja Mayoral equalised 11 minutes from time as the away side opened up a six-point gap above the bottom three.
Standings (Played, Won, Goal Difference and Points)
1. Barcelona: 27, 19, +43, 63
2. Atletico Madrid: 27, 16, +22, 56
3. Real Madrid: 27, 16, +15, 51
4. Getafe: 27, 12, +12, 45
5.