Ohio State has righted itself, but Michigan and Michigan State still remain on top.
Ben Brust scored 18 points, Sam Dekker added 17 and No. 4 Wisconsin used a 20-0 run in the first half to easily beat No. 23 Illinois 95-70 on Wednesday night.
DeShaun Thomas scored 17 points and No. 10 Ohio State used its stout defense to beat No. 22 Wisconsin 50-43 on Sunday for the Big Ten tournament title.
Jared Berggren and Ben Brust each scored 12 points, and No. 19 Wisconsin shut down Northwestern 69-41 on Wednesday night for its fifth win in six games.
Deshaun Thomas scored 25 points, including 10 during a game-breaking 15-0 second-half run, to lead No. 11 Ohio State past Wisconsin 58-49 on Tuesday night.
Jared Berggren scored 15 points and grabbed a season-high 12 rebounds, and Traevon Jackson added a career-best 14 points to lead Wisconsin over No. 12 Illinois 74-51 Saturday.