Chris Wilder is delighted with the strength in-depth in the goalkeeping department and he has praised the way they are coached.
Speaking primarily about the 'progression' of Chelsea loanee Jamal Blackman, Wilder remarked: "Jamal has done outstanding well. It is always difficult for a youngster to come up north from the capital and it was a brave decision from the boy to come.
"He was one we'd looked at last season to strengthen that department and with Simon out injured he's got better and better with games.
"Tuesday night at Bolton was a big test for our young loan players, we know they've got the ability but what about the character of the boys.
"Cameron did extremely well again tough opposition and showed a fantastic attitude and Jamal was exactly the same, he is coached excellently and worked really hard every day.
Wilder added: "Simon (Moore), Jake (Eastwood), Jamal, George (Long) and Aaron (Ramsdale) would all speak highly of Darren (Ward) and the way he works them and the information he gives them, so he will have marked Jamal's card about being strong and positive.
"His progression has been first-class and it is a massive position for the team. It's crucial you have genuine competition and I've never have a number one and number two at any club I've been at.
"Whoever has the shirt is going to take some moving if they are playing well, like Jamal is at the moment."