oh, carra's canny alright. but he is not 'dirty'. it's one thing to 'operate outside the rules', but it's another to be cynical. carvahlo has to be the worst defender in the premiership for pulling opponents' shirts in the box. i'm constantly amazed that he avoids getting booked or sent off. yet with carra, if his challenges aren't 'legal' it's usually hard to spot where he has conned the ref. so while carvahlo is a very effective centre half, i'd say - given the right officials - he could be the kind of liability to his team that carra never will be.