Coordinator Bill Davis previewed Friday night's preseason opener against the Chicago Bears and offered thoughts on the development of the Eagles' defense in his press conference before Monday's training session. Here is a Tweetcap ...

DC Bill Davis on Villanueva: We love his arm reach, but tough to get leverage at 6-7 and no defensive background ... His character is great. — Eagles Insider (@EaglesInsider) August 4, 2014

Davis: It's tough to evaluate defensive linemen before the physicality comes and you get punched in the mouth, do you stick to technique? — Eagles Insider (@EaglesInsider) August 4, 2014

Davis: Glad to have Najee Goode for full offseason. — Eagles Insider (@EaglesInsider) August 4, 2014

On OLBs setting the edge: Nothing inside of you can get outside of you, that's when big runs happen. — Eagles Insider (@EaglesInsider) August 4, 2014

Davis: Nolan Carroll is a perfectionist, love having him ... Getting used to playing dime, which he hasn't done before. — Eagles Insider (@EaglesInsider) August 4, 2014

Davis: The goal of the preseason games is to get great evaluation of the players so we can pick the right team for the season. — Eagles Insider (@EaglesInsider) August 4, 2014

Davis: Beau Allen has great size and great feet, that's the combination you look for. — Eagles Insider (@EaglesInsider) August 4, 2014

Davis: I think all of our safeties have the ability to come down and cover third WR, which allows us to stay in base. — Eagles Insider (@EaglesInsider) August 4, 2014

Davis: Taylor Hart is as consistent as the day is long ... As coachable as any player we've had. — Eagles Insider (@EaglesInsider) August 4, 2014

Davis: The best way to evaluate your 2s and 3s is to see them against 1s ... Can make for chaos in Camp, but good chaos. — Eagles Insider (@EaglesInsider) August 4, 2014

Davis on switching up lineups in secondary: Trying to make sure communication is good for any situation ... Not determined by performance. — Eagles Insider (@EaglesInsider) August 4, 2014