Regarding the Celtics offense at the end of the game, here are the Celtics plays after they went up 98-88 with 4:56 left:
- Tatum missed a 3 with about 7 seconds left on the 24 while being guarded by Butler. Not really a bad shot at the time, although he probably could have passed it to White in the corner. Still, Brown's effort got him an offensive board.
- After the ensuing timeout, Smart took a difficult 3 instead of passing it to Brown. Not a fan of that play.
- Celtics up 98-90. Brown tried to feed Williams for a play at the rim, but the pass wasn't perfect and Williams had to come down first before attempting a shot from 5' out. Again, not a bad possession overall.
- Celtics up 98-90. White misses a midrange as the C's had difficult with the zone in that possession. But Tatum was fouled on the rebound and the Celtics still got 2 points.
- Celtics up 100-93. Tatum makes a perfect pass to Horford for what should have been an easy basket, but Al mishandles the ball and has to make a more difficult shot that misses.
- Celtics up 100-96. Tatum misses a drive that he was making all first half. Another case where the right play just didn't yield the desired result.
- Celtics up 100-97. Tatum attempts an open catch-and-shoot 3 that misses. But Brown's effort on the boards earns him 2 free throws, and to be honest a bit of ball luck Brown's should would have been an and-1. Then Brown misses the 2nd free throw so instead of 3 they get 1.
- Celtics up 101-100. Tatum gets by Butler but is bothered by Bam and misses both shots. Not a great possession.
- Celtics up 101-100. Heat are forced to foul Smart, who misses a big free throw. Doesn't really count as a "possession" in my book.
So there were 7 possessions and essentially 9 real chances that only netted them 3 points. Of the 9 chances, the Celtics probably got the play they wanted on 6. Of those 6, we had 3 missed shots by Tatum where at least 1 or 2 could have been expected to go in, a missed shot by Brown when he was fouled, and 2 mishandled passes that resulted in lower percentage shots. And one of the bad possessions ended up with Tatum shooting free throws.
So I don't really buy the argument that the Celtics "choked" down the stretch. There was indeed some shot luck that went against them; that Brown shot essentially rimmed out. There was admittedly one bad possession at a critical time with the Celtics clinging to the 1 point lead, but missing 2 free throws during that stretch was probably more critical to the end game situation.