BOSTON — Jayson Tatum scored 34 points, Jaylen Brown had 21 and the injury-depleted NBA-best Boston Celtics beat the Atlanta Hawks 113-103 on Sunday night. Kristaps Porzingis and Jrue Holiday were sidelined with injuries for Boston (13-4). Holiday was out for the second straight game with a sprained right ankle and Porzingis strained his left