Losing once to them in the last 7 years doesn't constitute them as our rival. Sure I hate those bastards but they're not close to how much I hate M*ch*g*n and Penn State. Illinois knocked us off in 2007 as number 1 and Wisconsin knocked us off out in 2010. If this was the criteria than Illinois was our biggest rival from 2007-2009. Our rivals are who we run into the most with recruiting and have historically good programs.