Barca were 2-0 up on the hour mark, thanks to goals from the in-form Thierry Henry and Samuel Eto'o.

However, the visitors made a remarkable comeback as Borja Valero and Pierre Webo leveled the scoring, before the Primera Liga top scorer Daniel Guiza snatched an injury time winner with his 26th of the season.

Barca are now in danger of losing third place to Atletico Madrid after the latter's 1-0 victory over Deportivo Lacoruna made them level on 64 points with Rijkaard's team.

Elsewhere, champions Real Madrid played out a 2-2 draw at Real Zaragoza, who are on the verge of relegation.

Villarreal cemented their second place with a 2-0 home victory over Espanyol.