Knicks forward Kristaps Porzingis is helped off the court after...

Knicks forward Kristaps Porzingis is helped off the court after an injury in the first half against the Bucks at Madison Square Garden on Tuesday, Feb. 6, 2018. Credit: Jim McIsaac

Kristaps Porzingis underwent surgery to repair a torn ACL in his left knee Tuesday morning, the Knicks announced. No timetable for a return has been provided yet.

The general rehab and recovery is anywhere from nine months to more than a year.

The surgery was performed by Dr. David Altchek and Dr. Answorth Allen at the Hospital for Special Surgery.

Porzingis suffered the season-ending injury last Tuesday after dunking over Milwaukee forward Giannis Antetokounmpo. He landed awkwardly and immediately clutched the back of his leg.

The 22-year-old Porzingis was named to his first All-Star team this season. He played in 48 games, averaging a team-best 22.6 points and NBA-leading 2.40 blocks.

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