Miller had eight points in the fourth quarter for the Grizzlies, including two 3-pointers. He finished with 15 points. Johnson had seven points, three steals and two blocks. Both of his blocks came in the final period.
Newly acquired Courtney Lee made his first start for the Grizzlies and scored 15 points. His 3-pointer gave Memphis an 84-82 lead with 8:48 left. The Grizzlies never trailed again.
The Grizzlies built an early seven-point advantage and maintained a lead for most of the opening half. The Hawks took a 26-23 lead to start the second quarter after Shelvin Mack's three-point play tied the game at 23 and Mike Scott's 3-pointer gave Atlanta its first lead.
But Memphis went up 30-28 Miller's 3-pointer 30 seconds later and gradually rebuilt a seven-point lead. Lee connected on a jumper from the baseline as time expired to give the Grizzlies a 48-41 halftime lead.
The Grizzlies scored 28 points in the paint in the first half, while the Hawks committed nine turnovers.
Memphis extended its lead to 13 points late in the third quarter, going up 77-64 on a fast-break layup by Miller. The Hawks closed the quarter with consecutive 3-pointers to trim the Grizzlies' lead to 77-72 entering the fourth.
NOTES: Hawks starting center Pero Antic did not play because of back spasms. His spot in the lineup was filled by Gustavo Ayon. ... The Grizzlies recalled guard Jamaal Franklin on Sunday from their NBA Development League affiliate in Fort Wayne, Ind. A second-round pick of the Grizzlies in the 2013 draft, Franklin is averaging 1.9 points and 1.4 rebounds in 14 appearances for Memphis. ... Grizzlies guard Tony Allen missed his fourth straight game with a sprained left wrist. ... The Hawks are 1-6 on the road against Western Conference opponents and their 6-13 road record is the worst of any NBA team with a .500 or better record.