Kentucky sophomore big man Willie Cauley-Stein is doubtful for Sunday's Elite Eight matchup against Michigan after suffering an ankle injury in Friday night's win over Louisville.

"He's still in a boot," John Calipari said on Saturday. "He's doubtful. ... I'd be stunned if he played."

Cauley-Stein was averaging 7.0 points, 6.2 rebounds and 2.9 blocks per game this season. He suffered an injury to his left ankle early in the first half and did not return to the game.