Barcelona lost veteran defender Gerard Pique to an adductor injury after just 23 minutes of Thursday's 1-1 draw against Eintracht Frankfurt in the Europa League.
Pique asked to come off midway through the first half, with Clement Lenglet taking his place to leave Barça with a back four of Ronald Araujo, Eric Garcia, Lenglet and Jordi Alba.
Barça were already without a recognised right-back due to the absences of Dani Alves (not registered) and Sergiño Dest (injured).
"Pique has left adductor discomfort," Barça confirmed in a statement later on Thursday. "Further tests pending to determine the exact extent of the injury."
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