In terms of numbers we're better off then we think. There's Dunne, Richards, Onuoha & Kompany who can play CB. There's Zab, Richards or Onuoha at RB and Bridge at LB, with Ball or Garrido who could step in there if required. While I'm not convinced about Dunne, apart from his crass stupidity yesterday, he did well against one of the most physical forward lines in the Premiership yesterday. So we potentially have six first choice defenders (if we get a de Jong in) and two second choice left backs.
Another decent CB and we're probably OK.