Wisconsin's Braelon Allen breasks into the end zone for a topuchdwon run during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Northwestern head coach Pat Fitzgerald leads his team on the field before an NCAA college football game against Wisconsin Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Jake Ferguson catches a first down pass during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Braelon Allen tries to get past Northwestern's Brandon Joseph during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Jaylan Franklin recovers his own fumble during the first half of an NCAA college football game against Wisconsin Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Northwestern's Stephon Robinson Jr. catches a pass in front of Wisconsin's Caesar Williams during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Chimere Dike congratulates Braelon Allen after Allen's touchdown run during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Leo Chenal stops Northwestern's Stephon Robinson Jr. for a loss during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin fans watch during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Danny Davis III catches a pass in traffic during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin head coach Paul Chryst reacts during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Braelon Allen tries to get past Northwestern's Bryce Gallagher during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Northwestern quarterback Andrew Marty throws a pass as he's hit bt Wisconsin's Jack Sanborn and Nick Herbig during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Caesar Williams nearly intercepts a pass in front of Northwestern's Stephon Robinson Jr. during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Jack Dunn congratulates Brady Schipper after Schipper caught a first down pass during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Danny Davis III celebrates his touchdown catch with teammate Chimere Dike during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Northwestern quarterback Andrew Marty throws a pass during the first half of an NCAA college football game against Wisconsin Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Graham Mertz looks to pass during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Caesar Williams nearly intercepts a pass in front of Northwestern's Stephon Robinson Jr. during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Brady Schipper catches a pass in front of Northwestern's A.J. Hampton Jr. during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin head coach Paul Chryst reacts during the first half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Braelon Allen gets past Northwestern's Cameron Mitchell during the first half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's John Torchio reacts with teammates after intercepting a pass during the second half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Dean Engram is congratulated after intercepting a pass during the second half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Jake Ferguson celebrates his touchdown catch with Chimere Dike (13) during the second half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Northwestern's A.J. Hampton Jr. reacts after returning a recovered fumble for a touchdown during the second half of an NCAA college football game against Wisconsin Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Northwestern's A.J. Hampton Jr. runs back a fumble for a touchdown during the second half of an NCAA college football game against Wisconsin Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Dean Engram intercepts a pass in front ofNorthwestern's Stephon Robinson Jr. during the second half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Braelon Allen is congratulated by teammates after running for a touchdown during the second half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Jake Ferguson is lifted by Tyler Beach after catching a touchdown pass during the second half of an NCAA college football game against Northwestern Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Faion Hicks breaks up a pass intended for Northwestern's Stephon Robinson Jr. during the second half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's John Torchio tries to get past Northwestern's Jacob Gill after intercepting a pass during the second half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

Wisconsin's Jake Ferguson gets past Northwestern's Brandon Joseph for a touchdown during the second half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. (AP Photo/Morry Gash)

FILE - Wisconsin's John Torchio tries to get past Northwestern's Jacob Gill after intercepting a pass during the second half of an NCAA college football game Saturday, Nov. 13, 2021, in Madison, Wis. Wisconsin has produced defenses that have ranked among the nation’s stingiest virtually every year since Jim Leonhard took over as coordinator in 2017. Leonhard faces perhaps his biggest challenge in maintaining that standard this year.(AP Photo/Morry Gash, File)