The injury occurred three minutes into the second quarter when Porzingis landed on Giannis Antetokounmpo's foot after converting a dunk. His left ankle seemed to buckle on the play. Porziņģis immediately grabbed his left knee after landing and was clearly in pain. Porziņģis needed to be helped off the floor by two teammates, and he wasn't putting much weight on his left leg.
Porziņģis entered play Tuesday averaging a team-leading 22.9 points per game and an NBA-high 2.4 blocks per game.
He previously missed two games due to a left knee issue and two games due to an ankle injury. In all, he has missed seven games this season and 33 over the course of his first 2½ seasons in the NBA.
New York (23-32) entered play Tuesday remaining hopeful of making a playoff run, though missing Porziņģis for extended time would certainly dampen those hopes.
The Knicks entered their game against the Bucks four games out of eighth place in the Eastern Conference, having lost 10 of 14.
This likely means Porziņģis will be kept off court for months, and in all likelihood he'll miss the Knicks' game vs the Milwaukee Bucks, slated for April 7 and dedicated to Latvia's centenary.