The Buckeyes (16-4, 6-2 Big Ten) used 13 points and seven rebounds from Aaron Craft to help overcome a four-point second-half deficit.
Wisconsin (14-7, 5-3) got 12 points from Traevon Jackson but fell for the third time in four contests.
The Badgers made 11 three-pointers but were not awarded a single free throw.
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