James Harden added 21 points for the Cavaliers, who have won four straight and seven of eight. Cleveland (51-29) can finish no lower than fourth place in the Eastern Conference and is 1/2 game behind New York for the third seed.
Nickeil Alexander-Walker scored 25 points for Atlanta, which has dropped its last two games after winning four straight. The Hawks (45-35) are one game ahead of Toronto for the fifth seed but only 1 1/2 in front of Orlando to avoid the play-in tournament.