The Celtics insist they know what's wrong with Kristaps Porzingis, but they won't give away any details. Boston Celtics center Kristaps Porzingis has been dealing with an illness that knocked him out of the lineup in March and has forced him to miss time here and there ever since.

Kristaps Porzingis has been limited in the East semifinals due to an illness, though there's still a lot unknown about it.

Boston Celtics star Kristaps Porzingis missed the second half of his team's stunning Game 1 loss to the New York Knicks with an illness, and coach Joe Mazzulla told reporters on Tuesday that the big man was day-to-day. Shortly before Game 2 on Wednesday, the team announced that Porzingis would be available.