"We have not completely forgotten about the goalkeeper but if you want to find a keeper much better than the ones we have, there few in the world to choose from," he said.
"There was a lot of talk about buying another goalkeeper because, at that age, when the player has no experience of the Premier League, you cannot be sure whether they will be able to handle the situation.
"But the way Kasper handled the Manchester derby made me more confident and I am not worried anymore.
"Maybe these young goalkeepers will make some mistakes because they do not have the experience.
"But that is part of football. You can't get experience sitting at home watching on TV. You have to be out on the pitch."