Louisville reserve guard Mike Marra is likely out for the season after reinjuring his left knee Friday.
Marra, who tore his anterior cruciate ligament in November, will undergo an MRI on Saturday.
The senior was returning from reconstructive surgery when he was injured early in practice.
''Mike was just pivoting, trying to make a pass early in practice and went down,'' Louisville coach Rick Pitino said in a statement. ''It's an unfortunate thing that happened. Mike took it very well and said it just wasn't meant to be.''
Marra averaged 6.2 points and two assists as a sophomore, starting 11 games. He scored six points in both of the Cardinals' first two games last fall before the season-ending injury.