Kos reminds me of Ferdinand; brilliant man marker, very good in the air but prone to brain farts moments.
Love him though.
Btw Is there anything like 'unlucky' defenders? Koscienly's cock ups are mostly fatal, he doesn't get away with them too often. He also scores some freakish own goals, you can't really blame him, but again when it happens so often(relatively speaking), is it all down to bad luck? or is it down to the way he defends?
If 'unlucky' defenders do exist, then I'll class Djourou as a very lucky defender. He makes you feel very uncomfortable but he mostly gets away with his cock-ups, I can't remember him costing us a lot of goals.