The outcome affected two of the first-round playoff series that will get under way this weekend.
Atlanta wrapped up home-court advantage in its post-season meeting with Boston, which will start Sunday. The defending NBA champion Mavericks finished as the No. 7 seed in the Western Conference and will face Oklahoma City in the opening round starting Saturday.
The Dallas-Oklahoma City series will be a rematch of last year's conference finals.
Dirk Nowitzki led Dallas with 22 points in 26 minutes.