India, March 23 -- Joshua Jefferson injury update: Iowa State will be without one of its most important players as it faces Kentucky in the second round of the NCAA Tournament. Star forward Joshua Jefferson has officially been ruled out for Sunday's matchup, as per the latest injury report.

Jefferson's absence comes after he injured his left ankle less than three minutes into Iowa State's opening-round game against Tennessee State. The forward appeared to twist his ankle awkwardly while landing after attempting a layup. He was unable to put weight on his left foot and had to be helped off the court by staff.

He did not return to the game and was later seen on crutches.

Heading into Sunday, signs had already pointed toward Jefferson mis...