Posted by ESPN.com's Adam Rittenberg
1. Running men -- Illinois can feel optimistic about its ground game after the development of sophomore running backs Jason Ford and Mikel LeShoure this spring. Both players markedly improved their physical conditioning and combined for 93 rush yards on 17 carries in the spring game. They should take the running load off of Juice Williams this season.
2. Man in the middle -- Martez Wilson moved to middle linebacker and could be on the brink of reaching the lofty expectations set for him when he arrived from Chicago's Simeon High School. Wilson adjusted well to the defense's premier position after an up-and-down sophomore season. He also has fully recovered after being stabbed outside a bar in December.
3. Receiver rotation -- The Illini could have the Big Ten's best receiving corps next fall -- by far. Everyone knows about first-team All-Big Ten performer Arrelious Benn, but Illinois boasts depth with Jeff Cumberland, Chris Duvalt and others. The team also adds a big piece in Florida transfer Jarred Fayson, who was practicing with the first-team offense this spring before sustaining a foot injury.
1. Line limbo -- Illinois loses three starters from the defensive line and needs to identify a capable pass-rusher after losing its top four sacks leaders from 2008. The tackle spot should be solid with Corey Liuget, Josh Brent and Sirod Williams, who returns from a torn ACL, but there is some doubt at defensive end. Jerry Brown dominated in the spring game, but he must clear some academic hurdles before the fall.
2. Run stoppers -- The Illini really struggled against the run last season and lose top tackler Brit Miller, an All-Big Ten linebacker. They need more help from the back seven, particularly Wilson and safety Donsay Hardeman, who sat out spring drills because of a neck injury.
3. Cornerback -- NFL first-round draft pick Vontae Davis leaves a hole at cornerback, and Illinois will be looking for a top cover man in preseason camp. Tavon Wilson could very well step into Davis' spot, and the sophomore had a nice spring. Davis was not only a playmaker against the ball but a capable tackler, finishing second on the team with 78 stops last year.