Costel Pantilimon has done little wrong since taking Hart's place and could be back in goal for Sunday's clash with Swansea in the Barclays Premier League.
Pellegrini said: "I think that is a question for next Saturday.
"When we start the next game of the Premier League we will talk about who will start playing.
"The important thing for Joe is that he will play tomorrow and we hope he will have a very good performance."
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