I'm sure you'll like this @Gil Scott-Heroin you've been preaching about Al Horford's defense.
Porzingis v. Celtics - 3 out of 14, 12 points
Embiid v. Celtics - 4 out of 16, 11 points
LMA v. Celtics - 5 out of 13, 11 points
And that can largely be attributed to his efforts. His help defense all over the floor has been incredible too. I think what's helped him out most, is that Boston's starting lineup is A LOT bigger and longer this season, and the holes are more manageable to cover.