Southampton goalkeeper Gavin Bazunu will be out until 2025 after rupturing his Achilles tendon.
The 22-year-old was injured during the warm-up ahead of Saints' 3-0 win over Preston on Tuesday night.
The Republic of Ireland international has been first choice at St Mary's since joining from Manchester City for a reported £12m fee in June 2022.
This season he has started 41 league games, keeping 11 clean sheets, and played six times for Ireland.
"Gavin had an operation yesterday. He's ruptured his Achilles tendon so it was as bad as we feared.