Andy Butler, who netted his first United goal at Northampton Town on Tuesday, acknowledges the competition for a starting berth at the heart of the Blades defence is going to be fierce this season.
The former Walsall skipper is impressed with the fellow defensive options Nigel Clough has at his disposal.
He remarked: "The friendlies are about getting to know people's strengths and weaknesses; it is a team game, formed on partnerships.
"I thought Harrison (McGahey) did very well against Northampton. He's a young lad with an old head on his shoulders. Everyone knows what Neill (Collins) is about.
"I've not had the chance to play with Harry (Maguire) yet but hopefully that chance will come."
The Yorkshire born centre-half is also confident in his ability to play out from the back if selected.
Butler added: "One thing the Gaffer is big on is us coming out from the back with the ball.
"I tried to do that with Walsall and it's something I will adapt to doing here. I'm looking forward to trying to start moves from the back."