Kristaps Porzingis is struggling in the playoffs due to a mysterious illness he can’t explain, calling it heartbreaking and physically draining.

We still don't know what exact illness Kristaps Porzingis is fighting, but we do know a bit more about the whole ordeal after the Boston Celtics center opened up to reporters following the Celtics' Game 2 loss to the New York Knicks.

When Kristaps Porzingis concluded his first six-minute shift Wednesday night, he looked like he’d just run a marathon. His breathing was heavy. He was visibly fatigued. When he took his seat on the Celtics bench, he dropped his head and stared at the TD Garden parquet.