The Spanish midfielder came in for Deco in the 83rd minute to fire the winner from a superb first-time shot five minutes later.

The Blaugrana have now 47 points six behind leaders Real Madrid.

Barcelona did everything except scoring. Thierry Henry and Lionel Messi had several attempts on goal but were denied by Osasuna's firm defense and their lack of efficiency.

Coach Frank Rijkaard brought in Ronaldinho, Giovanni dos Santos and Xavi to grab the winner.

Andreas Iniesta fired a ball that was blocked by a defender but Xavi was waiting for the rebound to unleash his screamer.