BOSTON — Dyson Daniels hit a short jumper in the lane with just over a minute left in overtime and Onyeka Okongwu made two free throws with 11 seconds left, lifting the Atlanta Hawks to a 119-115 victory over the Boston Celtics on Saturday night.

Trae Young led Atlanta with 28 points and 12 assists, and Daniels finished with 23 points. Jaylen Brown had 24 points, 11 rebounds and eight assists for Boston, who was missing centers Al Horford and Kristaps Porzingis.

The Celtics had a 90.3% chance to win, per ESPN Analytics, when they were leading 103-100 with 20.1 seconds to go after a technical free throw from Jayson Tatum. But a Jrue Holiday turnover followed by a pair of costly fouls on Young helped send the game to overtime.

After the game, Holiday took responsibility for the loss, saying his “execution needs to be better.”

In the extra frame, things got heated between the two teams after Tatum and De’Andre Hunter got into a tussle going for a rebound. The pair had to be separated. Officials didn’t issue any technicals, which was important because Tatum had received one in the second quarter.

Tatum finished with 23 points after coming into the game listed as questionable with a left shoulder strain. He shot 7 of 21 overall and missed two shots late in regulation and overtime.

The shooting struggles extended to the entire team, as Boston finished 15 of 52 on 3-pointers. The Celtics are 1-7 in their last eight games when shooting 30% or worse on 3-pointers; four of those games have come in January.

The Hawks, meanwhile, improved to 4-1 against the Celtics and Cavaliers this season.

The Associated Press and ESPN Research contributed to this story.