The 28-year-old, who has struggled to hold down a regular place this season, pulled a leg muscle in training last week.
Barca forwards Thierry Henry and Bojan Krkic picked up knocks in the European game against Schalke on Wednesday, while midfielder Andres Iniesta has a knee problem.
Portuguese midfielder Deco has missed the last month with a calf injury, but he may still be fit for the first leg.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.
Bookmark with:
What are these?