Johnathan Loyd contributed 11 points and seven rebounds as Oregon (9-0) extended its best start since 2006-07, when the Ducks went 13-0 to kick off the season.
Joseph Young helped out with 14 points and Elgin Cook had 12.
The Fighting Illini (9-2) were led by Ryvonte Rice and Tracy Abrams with 16 points each.
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