Errrrr......there isn't one. You build from the back. Confidence comes from knowing what's behind you. Roberts, Mawson, Nyatanga are struggling. I think Nyatanga is up to the task if he has the support. This other chap may not be here for long. You build from the back. We need someone solid in the centre. Not what we have displayed. Full back wise, if you stick with Juddy and Wabara you may stay in this league. You will never get out of it though.
And for a defender its also knowing what is in front of you. On Nyatanga, he is the most uncomfortable on the ball of all the defenders so I can't agree. Get Long back in and then we will see.