He said: "Of course people are looking for him to make a mistake because of the transfer fee but Craig just takes everything in his stride. I've seen goalkeepers get very nervous after an error but not Craig - there again he doesn't make mistakes in the first place.
"He's come on so much as a keeper, just watching him in training again this week reminds you he is one of the best in the world. You saw him play against Manchester United last week and he was just unbelievable. Yes, there are people who will say a goalkeeper isn't worth £9m but I think Craig is outstanding value at that and, if he has a good season in England, he could well be worth even more."