"Maybe by Thursday morning I will know more because it is going to be day to day," Izzo said.
How soon Payne returns now rests on how much soreness he has from working his way back and determining whether any soreness is from starting to use muscles again or if it is soreness from the injury itself.
But being back in practice had him "very animated," Izzo said.
As the Spartans look to get healthier after Payne missed the past six games, the next step will be adjusting to having the 6-foot-10 forward back in the lineup.
"It's going to be another threat," he said. "It's going to be a threat inside that we haven't had."