A few thoughts ...
1. Theis is really, really good at rolling to the basket, but the ball-handlers were off in their rhythm. Tatum hit him multiple times, but I also saw Kyrie and Rozier miss him several times.
2. I wouldn't be surprised if Brown was fasting this game. It's a habit of his at different times.
3. When Irving locks in on defense, opposing ball-handlers are in trouble.
4. When Brown locks in on defense, he is an all-nba defender.
5. The Celtics offense, handoffs, pick-and-rolls, secondary pick-and-rolls, off-ball movement, etc. are all way off right now. They know what to do, but they are completely out-of-rhythm with each other.
6. The defense tonight was better than they are being given credit for.
7. Tatum needs to touch the ball more as a play-maker -- not just as a finisher/shooter.
8. Horford looked like he didn't want to shoot late. He needs to shoot confidently.
9. Hayward, Tatum, and Horford had shots at the hoop that they passed up to kick it out for 3s. That is the right play sometimes, but it seemed like they could have tried to draw fouls and finish at the rim more.