Match-ups that might give Kentucky trouble

So Kentucky moves into the NCAA tourney undefeated, having been challenged only a few times. After looking    at the season, I have come up with who I think could do it. 

1. Virginia

2. Wisconsin

3. Iowa St

The big reason, these 3 play great D. Granted, they won't have a chance to see any of these until the Final Four or Championship game.

I see the Wildcat nation being all defensive, remember, I'm just a basketball fan/blogger giving my opinion.

Seeing, Kentucky's road, I think they will probably see Notre Dame in the a Elite Eight, but that may be the biggest challenge they see until the Final Four. 

Again, these are really just my random thoughts.