Ferguson quoted on the official site:
Ji is back training and he will almost definitely be playing by the end of December. He is doing really well.
"He may have to wait until the beginning of next year, but he is certainly on the way back. He's doing good training.
"Mikael Silvestre, as we predicted, could be back in March. And Ben Foster is also doing some good work. We expect him to be available in February, or maybe March."