Russell Martin expected Joel Latibeaudiere to be out of action for at least three to four months after dislocating his shoulder.
The defender sustained the injury in the opening half of Swansea City's 2-2 draw with Millwall on Tuesday night and was carried off the pitch on a stretcher. He is now unlikely to feature before the season is temporarily paused for the World Cup in Qatar.
"He was in agony. I’m so sad for him," said Martin. "He’s one of the best, Joel. One of the best pros, best lads, mentality, focus every day, as a team-mate the amount of value he adds. I’m really gutted for him. I’m getting a bit emotional talking about him."