BOSTON — Paul Millsap scored 15 of his 20 points in the fourth quarter and Al Horford finished with 21 points and 10 rebounds as the Atlanta Hawks rallied to a 109-101 win over the Boston Celtics on Friday night.

Dennis Schroder scored 22 for the Hawks, including five during an 11-2 run midway through the fourth quarter that put them ahead for good. Atlanta outscored the Celtics 38-28 in the final period.

The Celtics led by 10 in the first half, but could not overcome a season-worst 22 turnovers and lost their third straight.

Isaiah Thomas scored 29 for the Celtics, hitting 14 of 15 foul shots.

Jae Crowder scored a career-high 24 and had 10 rebounds.

Kent Bazemore scored 15, Thabo Sefolosha added 11 points and eight rebounds and Kyle Korver also scored 11 for the Hawks, who ended their own three-game slide Wednesday night by beating Philadelphia 127-106.

Thomas converted a four-point play early in the fourth quarter to put Boston up 79-77 and start an 11-4 run. R.J. Hunter hit a pair of 3-pointers during the surge and the Hawks started to lose their composure as Bazemore and Millsap both picked up their fourth fouls.

Despite the foul troubles, the Hawks stuck with their starters and they outscored Boston 11-2. Schroder started it with a 3-pointer and added a layup that gave Atlanta a 92-90 lead with 3:42 left to play.

Thomas made a pair of free throws to tie it at 92, but Millsap answered with a three-point play and a layup to put Atlanta up 97-92.