At first, Michigan basketball was nervous to play at Purdue on Friday night.
Not because it was a crucial road game against a team that had won four consecutive games and had yet to lose at Mackey Arena this season.
No, the Wolverines were nervous because of the current reality of college basketball.
The Boilermakers announced Friday afternoon that guard Sasha Stefanovic had tested positive for COVID-19 and would miss the next three contests, including Friday's game.
Michigan had learned of the news the day before, although it didn't know who had tested positive.