Jeremy Lin scored 20 but the Hawks lost to the Heat 119-113 Friday night in Miami.
It was the final preseason game for the Hawks, who finished 2-3.
Alex Len scored 14, Kent Bazemore added 13, Trae Young and Tyler Dorsey both had 11 and Alex Poythress finished with 10 for the Hawks.
Young went 4-for-9 from the field and had five assists, three rebounds and two turnovers.
Josh Richardson scored 24 to lead the Heat (3-3).
The Hawks open the regular season Wednesday at the Knicks, the start of a three-game road trip that includes games at the Grizzlies on Friday (Oct.