Michigan and Illinois survived scares to remain atop the Big Ten standings.
The Wolverines nipped Wisconsin 20-17 and the Illini rallied to beat Ohio State 34-22 Saturday.
In other games, Penn State got by Indiana 28-14, Purdue downed Michigan State 24-14 and Iowa outscored Minnesota 42-24. Northwestern lost 43-42 to Bowling Green in a nonconference match.
In the new Associated Press college football poll released Sunday, Illinois is No. 10 and Michigan is No. 11.
Hayden Epstein kicked a 31-yard winning field goal at Madison, Wis., after Brandon Williams recovered a muffed punt in the closing seconds.
"That was a big break," Michigan coach Lloyd Carr said. "That game was definitely headed for overtime."
The Wolverines (8-2, 6-1) kept their Big Ten title hopes alive and ended the Badgers' six-year bowl run with the bizarre finish.
The Badgers (5-6, 3-4) appeared on their way to their first victory over Michigan since 1994 when they lined up for a 36-yard field goal with 1:26 left, but Mark Neuser was wide right by a foot.
The Wolverines turned two blocked punts into 10 points and forced two more shanks with pressure.
"It feels like you got sucker-punched, especially the way it ended," Badger senior safety Joey Boese said.
Behind 21-20 in the third quarter at Columbus, Ohio, Kurt Kittner led Illinois to a comeback victory for the fourth game in a row. He completed 18 of 28 passes for 274 yards and two touchdowns with one interception.
"We're not happy with the Citrus Bowl," Illinois wide receiver Walter Young said of the Big Ten's second bowl affiliation. "We want a BCS bowl. We're greedy."
Illinois (9-1, 6-1), which won its sixth in a row since losing to Michigan, can clinch at least a share of the conference title with a victory at home on Thanksgiving against Northwestern.
Ohio State (6-4, 4-3) was without Steve Bellisari at quarterback. Bellisari was suspended indefinitely Friday after his arrest on two counts of drunken driving.
Montrell Lowe ran for 121 yards and two scores at West Lafayette, Ind., and Purdue (6-3, 4-3 Big Ten) is bowl eligible for the fifth straight year.
The Spartans (5-4, 3-4) were without starting quarterback Jeff Smoker, who was out with a sprained left shoulder. Spartans turned to third-stringer Damon Dowdell, who had thrown one pass this season. Dowdell finished 24-for-45 for 304 yards and two interceptions.
But Michigan State turned the ball over six times.
"When you turn the football over as many times as we did, it's hard to win," Spartans coach Bobby Williams said.
At Evanston, Ill., Northwestern blew a two-touchdown lead with 3:44 left.
Northwestern's Zak Kustok threw for three TDs and ran for two others, but threw a last-second interception in his final home game as Northwestern fell to 4-6 and out of bowl contention.
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