Izzo told Lucas he should spend the time thinking about his leadership role. Izzo wants Lucas to take more responsibility for leading the No. 11 Spartans (9-3).
Izzo says Lucas is not suspended. But it isn't yet known if the 2008-2009 Big Ten Player of the Year will be in the lineup Wednesday against Texas-Arlington.
Izzo says his concerns with Lucas do not involve academics or legal issues.
Lucas is averaging 15.7 points per game this season.