The Celtics All-Star will be evaluated within the next week to determine if surgery is necessary, the source said.

Boston Celtics wing Jaylen Brown played perhaps the most complete game of his career on Wednesday when he scored 26 points, dished 12 assists, grabbed eight rebounds and committed only two turnovers in 37 minutes in the Celtics' 127-102 win against the New York Knicks in Game 5 of their second-round series.

The Celtics, who won the championship last year against the Dallas Mavericks, lost Jayson Tatum to an Achilles tear in Game 4. He could miss the entire 2025-26 season. Jaylen Brown did all he could to keep Boston's season alive after Tatum went down. He scored 26 points in Game 5 and 20 in Game 6 before fouling out.