I don't think it's a priority for Villas-Boas and the Board right now because our problems don't lie in defence, they reside in attack - including the midfield. Defensively, we're a very strong unit. In the past, our shape has required the fullbacks to be more active and more like wingers than in any other. With Villas-Boas there is a less pressing need for it. Which is why we can make do with Bosingwa there for now, and if he's not available, Ivanovic is reliable in defence.