Still giving the left winger too much room to attack him.
I dont mean to be a negative nancy, but he was torn apart by Petrov earlier on in the season because of his positioning, and despite his performances overall having improved, hes still playing and positioning himself in a way that leaves him open to a decent winger.
I'm not convinced he's a fullback. Doesn't look like it to me. Looks more like the commanding centre-half we've been crying out for.