Jeff Teague added 15 points and six rebounds for the Hawks, who jumped off to a 20-6 lead and were never seriously threatened en route to a 1-0 advantage in their Eastern Conference quarterfinal series.
Rajon Rondo put in 20 points to go with 11 assists and Kevin Garnett had 20 points and 12 boards for the Celtics, who shot only 39 percent from the floor. Boston went 0-for-11 from 3-point range.
Game 2 will be Tuesday in Atlanta.
Exploding whale video goes viral on Internet
Selena Gomez drops F-bomb, walks off stage during Jingle Ball performance