Antonio Reeves had 30 points as Illinois State got past Chicago State 80-71 on Saturday.
Reeves shot 6 for 8 from deep.
Josiah Strong had 19 points for Illinois State (5-5). Howard Fleming Jr. added 10 points.
Kendall Lewis had seven rebounds.
Jahsean Corbett had 17 points and six rebounds for the Cougars (3-6). Coreyoun Rushin added 13 points and nine rebounds. Dominique Alexander and Favour Chukwukelu each had 11 points.