Thanks mostly to Al Horford, the money is off Tatum's back. The Celtics are tied 2-2 in this series with homecourt advantage over the final 3, which is arguably right where they should be, Tatum game 3 stinker or not.
Tatum wasn't great in game 4, but the difference from game 3 was stark. Ignore the shooting line and you still see contribution to the game: 13 rebounds and 5 assists. For long stretches in game 4, the Bucks were frustrating him along with the rest of the Celtics. He had a moment in the third quarter where it looked as if he was going to start to assert himself, eventually getting his shooting line to 6 of 12 for 18 points. But he missed his next 6 shots, including 4 straight as the Bucks opened up a lead in the third. But then he threw down 12 points in the fourth, on 5-6 shooting, including all but slamming the door shut in Milwaukee's face with 8 straight points late in the 4th when Milwaukee put George Hill in. Earlier in the quarter he drove, missed a layup (his only miss of the Q), tracked down his own rebound, and scored. End of game, he had 30 points on 11 for 24 from the field. It wasn't one of his dominant wire-to-wire performances, but this too is a sign of greatness: having a game where you struggle through a lot of it yet still drop 30 including a dozen in the 4th.
Tatum still has issues to work on. Two straight games where he, with the rest of his teammates, lost focus on the third, worried about the officiating and not the game, and let the Bucks open up a lead. Then, part of his late game stretch in the fourth was a crazy layup that he released after falling and just before hitting the groud. Great shot, but after hitting that Tatum looked up at the refs to complain about no foul call... while Milwaukee was running transition off the made basket. Didn't hurt them but in a close game bitching at the refs while your opponent is running transition is not acceptable.