At times we got in and around the 18-yard box and we should have pulled the trigger.Steve Spooner.
Blues had looked good for all three points after Jack Concannon’s fine finish gave them the lead.
But a dubious penalty awarded to The Blades in the 80th minute saw the South Yorkshire side leave the St. Andrew’s Trillion Trophy Stadium with a draw.
“I thought our football deserved a victory,” said Blues' Senior Development Coach Spooner.
“In patches we were very good with our use of the ball and have just got to make sure we don't turn into that side that's trying to score the perfect goal.
“At times we got in and around the 18-yard box and we should have pulled the trigger.
“The boys have had lots of shots this week (in training) and did a lot work on different variations of finishes as well.
"But when it came to the game, we didn't seem to be taking those opportunities.”
At times Blues struggled to find a way past an organised Sheffield defensive unit, and Spooner felt Blues may have been more effective if the visitors had come at his own side more.
“Their (United's) line-up is quite consistent week after week and you can see they've been really well coached,” he said.
“We could have really done with them having one or two more attacks so that we could break onto them because they were getting back and getting set up.
“I thought we were a little bit too one dimensional in the first half and we kept trying to go for the jugular too quickly instead of recirculating the ball and coming out and trying to probe down the sides.
“It was very hard to break them down.”
When Blues did finally break the deadlock, it came as a result of a well-worked corner kick, which had been practised on the training ground.
“It was down to Scotty Bevan (the goalkeeping coach) who set that up,” revealed Spooner.
“It was well-worked and finished excellently because it wasn't an easy finish coming back to Jack like it did.”
But Spooner was less than happy with the penalty that was awarded against his side.
“I didn't think it was a penalty, but I know for sure in the build-up to it that it was a foul on Odin Bailey and that's what infuriates me,” he continued.
“I think we're a little bit too nice in appealing. When that happens to us nobody really complains, and I think sometimes a shout can influence a referee.“