The England keeper has not featured in the league since a 2-1 loss to Chelsea on 27 October.
"We will see tomorrow the 11 starters," he said.
"And, when the transfer window starts, you will have a lot of difficulties to know who the first-choice goalkeeper will be because we will have (Iker) Casillas, (Victor) Valdes, (Manuel) Neuer, (Willy) Caballero, (Asmir) Begovic.
"I think you will have to ask me about six new goalkeepers!"
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