The attached link reference 'defending' is well worth a listen to.

http://www.talksport.co.uk/radio/listen-again/episode/55314

click on the 16:00 to 16:30 slot.

Also worth a look at the video below reference Chelsea's poor defensive play from back to front.

http://uk.eurosport.yahoo.com/football/premier-league/video/allvideos-22327918/27136804#video=27136804