Brandon Paul added 14 points and six assists for the Illini (2-0).
Illinois couldn't shake the Terriers early, but closed the first half on a 15-0 run to take a 45-25 lead. The Illini held St. Francis scoreless for 7:11 during the spurt.
Illinois had only eight turnovers, something that concerned first-year coach John Groce during exhibition play.
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Mike Brey is looking at former Notre Dame players to fill two assistant jobs that have opened up with the departures of Martin Ingelsby and Anthony Solomon.
Purdue's 2016-17 prospects got a jolt Wednesday when forward Caleb Swanigan announced he will return for his sophomore season.
Clemson's Jaron Blossomgame says he is withdrawing from the NBA draft and returning to school for a final season.