"I have great admiration for Ross, he has incredible potential," says Martinez.
"We need to give him time and need to accept that it will take time but he has absolutely everything.
"The manager of England has to decide what role there is for Ross, if any, but we need to make sure we give him 50 games to see his evolution.
"Any players with talent need to develop their understanding and the know-how to be effective. As a country we need to be more protective of our young players but if we look after him he can give the nation something unique."
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