Our season might explode sooner if we don't.
I predicted this scenario weeks ago. Rio simply cannot be relied upon anymore, now Vidic is out, Rio is our only experienced CB. If he is out for any length of time, which he will be, then we will have to play Evans and Jones.
Smalling will undoubtedly spend much of his season playing where he has already, filling in for the equally unreliable twins. Cahill would have been a shrewd buy imo. Offering experienced cover and a bit of pace at the back, whilst also allowing Jones to be used in midfield should the need arise.
Yes ideally we need a midfielder, but realistically we are not going to get one in Jan. Cahill would improve our options in midfield as well as at the back, and there is still time to gazump Chelsea.
No action at all from SAF and we will continue to have our effectiveness dictated by the injuries we suffer.