Hoosiers coach Tom Crean said on Monday's Big Ten teleconference he doesn't believe the injury will be "long-lasting," but Johnson's status for Wednesday's game at Purdue is yet to be determined.
"(There was) a red folder or papers that were laying close enough to the court, that he slipped on," Crean said, according to The Indianapolis Star. "They were just laying there, when he finished his layup."
Upon watching film of the Hoosiers' 82-70 loss, Crean saw Johnson step on a folder near Ohio State's cheerleaders along the baseline at the 17:40 mark in the first half. Johnson lost his footing and landed awkwardly.
Johnson was fitted with a knee brace at halftime and returned for nine minutes in the second half before leaving the game. He finished with two points and a rebound in 17 minutes (eight in the first half, nine in the second).
"I think the best news for Robert is he went back in the game, and now we have to monitor it in a very close way, and hope that it doesn't linger," Crean said. "We'll just kind of go, see what happens at the end of the day, and see how he feels."
If Johnson is unable to play, transfer guard Nick Zeisloft is expected to take his place in the starting lineup. Zeisloft started the second half for Johnson after the injury, playing a total of 16 minutes and scoring four points with two assists and three rebounds.
The loss to Ohio State dropped Indiana to 15-5 (5-2 Big Ten), one game behind conference-leading Wisconsin.
- Mike Fiammetta