Duke's Kyrie Irving could miss the rest of the season with a right toe injury suffered in the second half of Saturday's win against Butler.

Irving, an early candidate for freshman of the year, didn't break a bone but the injury involves ligaments.

"Kyrie's injury is a serious one," coach Mike Krzyzewski said after Duke beat Bradley on Wednesday night. "

Duke will not rush Irving back from injury, according to a source.

Irving is widely considered a future top-five NBA pick.