Joao Cancelo has undergone successful surgery on his right knee, Juventus have confirmed, and will be out through the end of 2018.
The defender picked up the injury before the club's Champions League group stage finale against Young Boys on Wednesday.
Already qualified for the knockout round, Juventus lost the game 2-1 to the Swiss club, progressing nevertheless as group winners thanks to Manchester United's defeat to Valencia.
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While initial reports suggested Cancelo had avoided serious injury, he instead was forced to undergo a medial selective meniscectomy at the Clinica Sedes Sapientiae in Turin on Friday.