As it has been recently announced, not only Nemanja Vidic but also Rio Ferdinand will be leaving the club at the end of the season. Leaving only Phil Jones, Chris Smalling and Jonny Evans to fight for center-back position, it is almost certain that the new manager will have to bring at least one, if not two new center-backs to the club. But who should they buy? Many different websites have been posting rumours about Mats Hummels (Borussia Dortmund), Ezequiel Garay (Benfica) or even Bruno Martins Indi (Feyenoord Rotterdam). I'm sure there are plenty of other rumors and even players who may not have attracted lots of media attention you would like to see at Manchester United, so write down your main transfer targets an ideas in the comments section below.