Green made an mistake that cost England the win against the United States in their opening game of the World Cup.
“I spoke with Robert Green on the phone and I was very happy with what I heard,” said Grant.
“I spoke only about the future and what will happen. He looks very strong and very intelligent.
“I don’t think it will have an effect on him. I can give examples, I was at the World Cup in 2002 and I saw the goalkeeper (Oliver Kahn) who didn’t stop a ball that my daughter could stop.
“They lost the World Cup and after this he was still the best goalkeeper in Germany.
“I saw on the television this year Iker Casillas, the best goalkeeper in the world in my opinion, concede a goal and everyone said it was his fault or the fault of his girlfriend or mother or whatever. He was the best player in his last three games.
“This is the life of a goalkeeper.
“For me Robert Green is a great goalkeeper, I watched him in the last year and I’m looking forward to seeing him in the first training.”