That means the champions have dropped just five points all season, but Villa know they cannot afford to be over-confident against in-form Sociedad.
"The game against Real could be a trap if we are over-confident," he said. "But that won't happen.
"In a league in which we can get to and may need 100 points, every game is important."
Villa has a good scoring record against Sociedad, having netted six goals in eight games against the Basque outfit, and the Spain frontman hopes to continue that run on Sunday.
"I will be looking to maintain that level at the Nou Camp," he said.