Barcelona full-back Dani Alves has been ruled out for up to three weeks with a damaged thigh muscle.
The Brazilian limped out of Barca's El Clasico draw with Real Madrid on Sunday, with scans now revealing that he has suffered a grade one tear.
Alves will miss Barcelona's Champions League tie with Celtic, as well as their La Liga trips to Deportivo la Coruna and Rayo Vallecano.
He will also be unavailable for international duty this week, where Brazil are scheduled to face Iran and Japan in friendly action.
Alves's layoff is the latest defensive injury blow for Barca coach Tito Vilanova, who is currently without centre-back pair Carles Puyol and Gerard Pique.
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