Atlanta backup point guard Dennis Schroder again shined against a Dallas team that was missing its starting point guard.
Led by Schroder's 17 points, the Hawks took the lead with a 13-0 run in the third quarter and went on to a 104-87 victory Wednesday night over the Mavericks, who were without suspended guard Rajon Rondo.
Schroder, the second-year player from Germany, made three of five 3-pointers. He also led Atlanta with a career-high 22 points in a 105-102 win at Dallas on Dec. 22.
"People are going to start learning he can shoot the ball and do a lot of things," Atlanta's Al Horford said.
The Mavericks suspended Rondo before the game for conduct detrimental to the team. Rondo had a heated exchange on the court with coach Rick Carlisle in the third quarter of Tuesday night's win over Toronto.
Carlisle said the one-game suspension was an "organizational decision" and said Rondo will start in the Mavericks' next game against Brooklyn on Saturday.
Schroder led six Atlanta players in double figures.
"I thought Dennis early, middle and late was a big factor," Hawks coach Mike Budenholzer said. "He hit shots. He guarded. I thought he did a lot of things well. We needed him tonight."
The Eastern Conference-leading Hawks have won two straight.
Monta Ellis led Dallas with 19 points.
Rondo's suspension left the Mavericks with only 11 players. Center Tyson Chandler (hip contusion) and forward Chandler Parsons (left ankle) were held out with injuries. Forward Amare Stoudemire was rested with the team playing on back-to-back days.
"It's tough," Carlisle said. "We've been in these positions before all year. We just have to look to the next guy to step up. We had opportunities to keep the lead. ... It just wasn't our night."
The Mavericks appeared to wear down. They set a season low with 34 second-half points.
Dirk Nowitzki had only four points while playing his fifth game in seven days.
"I felt fine, I felt good," Nowitzki said. "It was worth a shot. I think in order for us to steal this one we were going to have to shoot better from the outside, especially in the second half."
The Mavericks made only five of 31 3-pointers.
Dallas led by 14 points, the last time at 39-25, in the second quarter. The Hawks took the lead with their 13-0 run in the third, including seven points from Paul Millsap.
The Hawks stretched the lead by scoring the first 12 points of the final period.
