I expect Boston to try to keep Irving away from the ball on defense. Possibly even committing multiple defenders to denying him. McHale said earlier in the year when they played the Cavs (granted Kyrie wasn't there) that their game plan was to let LeBron shoot as much as he wanted but not let anyone else get going. Boston would be smart to try to take Kyrie out of the game and force LeBron to score more while looking to get the post guys involved more.
If you're the Cavs, you can't lose that physical tone that you tried to set. It didn't go well, but it will only get more physical as the playoffs go on.
The weave at the top was hurting the Cavs early. Avery Bradley and Marcus Smart shooting 20 footers isn't something I'm afraid of, so I think the Cavs need to go under the handoff screens at the top when those are the guys running the offense.
I'd like to see LeBron do a better job rotating on defense. He was very good on the strong side of the floor yesterday both on and off the ball. When the ball would reverse, however, he'd be late to a shooter or miss a box out that resulted in a rebound.