We need to keep Alex its as simple as that. I personly dont see Luiz as a CB and would rather see him pushed a little forward or even at RB. I can see us getting rid of Bosingwa so although i would like to see Luiz at RB it will proberly be Ivanovic so that leaves Terry, Luiz and Alex for CB and they are all needed without a dout. Alex showed how much we need him in the 2nd half of the league game at OT with some sensational defending especially the block from Rooney. Its no coincidence we didnt concede in the 2nd half.