Ayo Dosunmu scored 24 points and Illinois snapped a four-game losing streak with a 62-56 victory over No. 9 Penn State on Tuesday night.
Rutgers beat Illinois 72-57 Saturday.
Ali Patberg had 17 points and nine assists on Thursday night, and No. 20 Indiana pulled away late to beat Illinois 59-54.
Illinois star guard Ayo Dosunmu suffered no structural damage to his left knee in an awkward fall at the end of a loss to Michigan State, the school said.
The Terrapins (19-4, 9-3 Big Ten) took sole possession of first place in the conference with the win.
Iowa beat Illinois 72-65 Sunday.
Andres Feliz scored 17 points while Ayo Dosunmu and Kofi Cockburn added 13 each as No. 19 Illinois held on to beat Minnesota 59-51 on Thursday night.
After a dramatic victory at Michigan last weekend, Illinois coach Brad Underwood was asked about the fact that his team had taken sole possession of first place in the Big Ten.
Ayo Dosunmu hit a contested jumper from the free throw line with 0.5 seconds remaining to give No. 21 Illinois a 64-62 victory over Michigan on Saturday.
Kaila Charles had 20 points and nine rebounds to help No. 20 Maryland beat Illinois 79-60 on Thursday night.
The Big Ten suspended Illinois guard Alan Griffin two games Thursday for stepping on Purdue's Sasha Stefanovic.
After watching No. 21 Illinois play an uncharacteristic first half Tuesday night, coach Brad Underwood gave his team some simple instructions.
Illinois beat Northwestern 75-71 Saturday with 16 points from Trent Frazier.
Illinois defensive passing game coordinator and safeties coach Gill Byrd said Friday he is leaving the program because of an unspecified illness in his family.
Ayo Dosunmu scored 18 points and Kofi Cockburn added 11 and grabbed 17 rebounds and Illinois held off Rutgers 54-51 at home on Saturday.
Ali Patberg scored 19 points, Mackenzie Holmes had 16 points and eight rebounds, and No. 12 Indiana beat Illinois 83-42 on Monday night for its ninth straight victory in the series.
Illinois defeated Purdue 63-37 on Sunday.
Michigan State played perhaps its best game of the season at least in part because Cassius Winston and Xavier Tillman were clicking together on the court.
Garbers threw four touchdown passes and ran for another score, leading California to a 35-20 win over Illinois on Monday in the Redbox Bowl.
Kofi Cockburn scored a career-high 26 points and Illinois beat North Carolina A&T 95-64 on Sunday.