Celtics' Kristaps Porzingis: Unlikely to return

Porzingis is considered doubtful to return to Monday's Game 4 against the Heat due to right calf tightness, NBC Sports Boston reports.

The severity of Porzingis' injury isn't yet known, but his night is likely over. Adrian Wojnarowski of ESPN has already reported that Porzingis will undergo an MRI on Tuesday, and the initial indication is that he managed to avoid an Achilles injury. Boston should have more information on the big man's status over the next day or so before the Celtics host the Heat for Game 5 on Wednesday.