David Alaba suffered a hairline fracture to his rib in Bayern Munich's 7-2 demolition of Tottenham, the Bundesliga champions have confirmed.
Alaba was on the end of a wild early challenge from Serge Aurier and had to be substituted at half-time of the Champions League clash, complaining of severe pain.
Bayern initially announced the defender had sustained only "a heavy bruise", reporting his ribs had not been broken.
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But their manager, Niko Kovac, then confirmed on Friday that Alaba, along with fellow defender Lucas Hernandez, would miss Saturday's league clash with Hoffenheim.