Mavericks coach Rick Carlisle collapsed and was taken off the court on a stretcher during the team's practice on Friday.
He was released from the hospital on Friday afternoon.
Dallas president of basketball operations Donnie Nelson said Carlisle was "lightheaded and fainted" on the court.
"He got lightheaded and fainted, and who hasn't done that? ... You take every precaution when it does happen, and so we wanted to make sure everything was perfect. And it is."