Photo: Boston Celtics/X

During Game 4 of the Boston Celtics’ first-round series against the Miami Heat, Kristaps Porzingis exited the game due to a non-contact injury.

The Celtics later announced that Porzingis was doubtful to return due to right calf tightness.

According to sources reported by ESPN’s Adrian Wojnarowski, initial assessments suggest that Porzingis did not suffer an Achilles injury. Such injuries usually result in clear and immediate symptoms.