How does this impact Boston's postseason hopes? More importantly, what does it do to the team's contention window in the short and medium term?

The Celtics announced Tuesday that Jayson Tatum suffered a ruptured Achilles tendon in his right foot on Monday against the Knicks.

Boston Celtics star Jayson Tatum suffered a torn right Achilles tendon during Monday night's playoff loss to the Knicks, the team announced Tuesday. Tatum has already reportedly undergone surgery, and though an exact timetable for his return is not immediately clear, he is expected to miss a significant portion, if not all, of next season.