Ronaldinho and Barcelona keep winning
Although Fernando Llorente put the visitors ahead after 15 minutes, Ronaldinho brought the blaugranas back on level terms with a penalty seven minutes before half-time.
A Lionel Messi attack after 51 minutes then sealed the points for the host team although the win was soured by the late dismissal of Portuguese Deco.
FC Barcelona lined up with mexican Rafael Marquez and Carles Puyol at centre-half with the objective of taming the physical threat posed by the Athletic team.
Is good to remember that Athletic came to the Nou Camp fighting to stay in the Primera Liga but steady progress under coach Javier Clemente has given them hope for the future.
Llorente had a couple of dangerous plays in front of goal before he score the visitors lead after 15 minutes.
Yeste drifted a ball into the near post and Llorente escaped his marker to make a header across goal and into the corner.
Athletic was a danger for themselves soon after when Llorente diverted a cross towards his own goal but Unai Exposito was able to clear off the line.
Some minutes after that, Athletic were forced to pay for their own carelessness. Ronaldinho crossed a harmless ball which Fernando Amorebieta appeared to handle in the area.
The penalty shot was given. Ronaldinho stepped up to send Valdes the wrong way.
Before half-time Athletic wasted a great opportunity to restore their lead when Llorente headed over in front of goal.
Indeed, the second half was not the same contest with Barca always in control and Van Bommel in particular beginning to have his say.
And it was the Dutchman who sent a shot from inside the area parried after 51 minutes before Messi, scampering in at the far post, knocked in the rebound.
That way, Barcelona kept piling on the pressure but their forward line was struggling to find their usual rhythm in front of goal and too often the final ball went astray.
The last minutes were then marred by a mass melee which saw Deco given his marching orders for a shove on Carlos Gurpegi. However, it was too late to influence the outcome as Barca held on for the points.