Whiteside got hurt in Miami's season-opening loss at Orlando, a game where he finished with 26 points and 22 rebounds. He is listed as day-to-day and will be re-evaluated before Miami's Wednesday home game with San Antonio.
The Hawks are also likely to be without a starter. Point guard Dennis Schroder bruised his left foot in Sunday's loss at Brooklyn, saying afterward he does not expect to play in Miami.
Schroder averaged 23.3 points and 6.7 assists in his first three games. He took 69 shots in those, more than any other two Atlanta players combined had in those contests.