Nigel Clough hailed his side following Monday night's 0-0 draw at Preston North End.
The Blades were unable to make it 11 successive wins but did make it a Club record of eight consecutive clean sheets with a resolute defensive display.
Afterwards, the Blades chief commented: "It was a superb battling point, we've not defend much better than that in the last ten games - under the circumstances, losing two left backs, and how good a side Preston are, it was a brilliant clean sheet.
"I thought we were better in the second half and could have nicked it, including a good shout for a penalty late on, maybe we wouldn't have deserved it but we would have taken it. We could see that Harry's shirt was being pulled, maybe the referee couldn't see but the ref had a good game, generally.
"I didn't think we were good enough on the ball, we could have been more clinical on the break but a few things went astray.
"That said, there was mental strength and character and that has to show through when you go to places like Deepdale. Six or eight weeks ago I don't think we would have withstood that pressure but we have a belief now and the lads are spurring each other on.
"It is a case of resting the lads up and getting them right for Saturday because one or two looked a little heavy legged at the end."