Costel Pantilimon has been given a chance by City boss Manuel Pellegrini in Joe Hart's place and the Romanian has so far done little wrong.
Pellegrini was non-committal when asked after the game who would play at the weekend.
Richards said: "Pantilimon has come in and done really well, so it's a hard topic for me to really comment on.
"All I can really say is both are quality players and I'm just glad Joe Hart is back to his best now and it's up to the manager to decide who he picks."
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