Forster will step aside for Hart after making his debut in defeat to Chile.
He said: "Joe's proven what a top-class keeper he is and made save after save. He'll come back stronger. He's a great lad. He's someone I speak to all the time.
"He's one of the best people I've come across in football.
"It's just a case of me doing as well as I can at club level and when I'm with the squad just trying to make as good an impression as I can.
"It's just a case of waiting your turn and trying to impress in training."
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