In fairness Roberto Carlos was better at free kicks than defending - a bit like a proto-Bale. Cost Brazil at leats 2 world cups with his poor positioning.
He was for me one of the best wing backs that there has ever been. His defending when Henry scored against them in 2006 was pathetic. Wasn't he tying his shoe laces or some crap like that? Anyway, he wasn't the greatest defender in the world but he and Cafu basically reinvented the roles of the full back in an attacking sense.