The 1983–84 Illinois Fighting Illini men's basketball team represented the University of Illiniois.

The next game was a two-overtime win at Iowa, Lou Henson’s 400th victory as a college head coach.

The Illini recorded a 26-5 mark and were 15-3 in Big Ten play, tying Purdue for the league title.

Illinois advanced to the NCAA Regional Finals before dropping a heart-breaking 54–51 loss to Kentucky on its home court, causing the NCAA to put a rule in place not allowing a school to play in a tournament game on its home court.

Rumors also were floated that the outcome was predetermined, with home team time clock operations being implicated in part.