Joel Embiid has cleared the concussion protocol but will not play in Game 2 against the Heat.
Brett Brown admitted the 76ers don't have a clear idea of when Embiid will return.
Embiid suffered a broken orbital bone and concussion in a collision with teammate Markelle Fultz on March 28. He underwent surgery to repair the fracture and has been sidelined since.
Between Game 2 and Game 3, Embiid may participate in on-court work with members of the coaching staff or players who are not in the regular rotation.
"That's part of Joel's return-to-play plan," Brown said.
Embiid previously said he's is optimistic about playing in Game 2 or Game 3.