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.

Celtics HC Joe Mazzulla says they do know the illness Kristaps Porzingis is dealing with and it’s impacting his “fatigue and his breathing.” He’s hoping two days off will help KP.