Paul Millsap had 17 points and eight rebounds, and the Atlanta Hawks beat the Celtics, 104-92, in Game 6 of the teams’ best-of-seven NBA playoff series in Boston on Thursday night.

With the victory, Atlanta advanced to face top-seeded Cleveland in the Eastern Conference semifinals.

Leading 41-33 at halftime, the Hawks used a 39-point third quarter to pull away for good. Al Horford and Kent Bazemore each added 15 points for Atlanta.

Isaiah Thomas led the Celtics with 25 points and 10 assists. Boston lost in the first round for the third consecutive NBA playoff appearance.

2016 NBA Eastern Conference Playoffs: First Round

(4) Atlanta Hawks vs. (5) Boston Celtics

Sat, April 16: Atlanta 102, Boston 101
Tue, April 19: Atlanta 89, Boston 72
Fri, April 22: Boston 111, Atlanta 103
Sun, April 24: Boston 104, Atlanta 95 (OT)
Tue, April 26: Atlanta 110, Boston 83
Thu, April 28: Atlanta 104, Boston 92

Atlanta wins, 4-2