What kind of work have you seen on defensive production? Lots of work on offense, but what about defense? I've started doing some of it but would be curious to know what else is out there (reinventing the wheel isn't that much fun). Here's what I've done so far (it's very limited): http://soccerbythenumbers.blogspot.com/2010/09/defensive-production-goals-against-in.html PS: Not currently interested in goalkeepers - that's for another day.