It was the final exhibition game for both teams.
Louis Williams scored 17 points for the Hawks (3-4).
With starting power forward Jason Maxiell in foul trouble, Pistons rookie Andre Drummond got extended minutes with the starters and finished with 13 points and 10 rebounds. The ninth overall pick in this year's draft also blocked two shots.
Tayshaun Prince added 15 points on 7-of-12 shooting for Detroit (4-4).
After finishing the preseason undefeated at home, Detroit will host Houston in its opener on Wednesday. The Rockets then travel to Atlanta to face the Hawks in their opener on Friday.
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Heat guard Dwyane Wade turns back the clock by impressively driving through the Hornets' low-post defense, leading to an easy layup.
Heat teammates Goran Dragic and Hassan Whiteside continue to showcase their chemistry as Dragic lobs up a pass for Whiteside to jam home.
During halftime of the Game 7 matchup between the Hornets and Heat, NBA legend Scottie Pippen visits Charlotte owner Michael Jordan to the delight of both former Bulls teammates.