Chuba was only on the bench last Saturday to give everyone a lift. Carrick will have had no intentions of using him.
To be honest, I don't know what to make of him not being included in tonight's squad. The club have been extremely vague regarding his injury and current fitness levels. I suppose we have to assume that he's still a long way off being fit enough to feature, otherwise it would have made sense to have had him on the bench, and to have given him 20 minutes at least.
Of course, the reality is there could be another reason why Carrick has chosen to wrap him up in cotton wool.