Lionel Messi, Andres Iniesta and David Villa struck as La Liga football champions Barcelona picked up where they finished last season with a 3-nil win at Racing Santander.
Messi, who grabbed a hat-trick in the Spanish Super Cup last weekend, needed just four minutes to rip open the defence and score with a delightful lob.
Iniesta followed up with a volley from outside the area and new signing Villa headed his first league goal in a Barca shirt, after Victor Valdes had saved a penalty before the break.
Second division champions Real Sociedad celebrated their return to La Liga after a three-year absence with a 1-nil win at home to Villarreal.
A double strike from Pablo Osvaldo helped Espanyol overcome Getafe 3-1 while the games between Deportivo Coruna and Real Zaragoza and Osasuna and Almeria ended nil-all.
