Chris Wilder has warned everyone connected to the Blades not to expect an easy ride at the Pirelli Stadium on Friday evening.
United travel to face Burton Albion knowing a victory over the Brewers will see the Blades reclaim top spot, but Wilder is wary of the threat posed by Nigel Clough's side.
He remarked: "This is a game where people can easily get carried away and look at the league table and think it will be an easy night and three comfortable points.
"But with all the sub plots flying round and Burton's fantastic achievements over the past years, especially in the last 12 months it won't be.
"Nigel Clough should have been Championship Manager of the Year last season for keeping them in the division.
"And obviously him being an ex-manager of Sheffield United adds more to the game. It will be a tough night and a tough game. We will have to be right at it if we're to get a positive result."
And Wilder admiration and relationship with the manager in the opposing dugout on Friday goes right back to 2001.
The United chief added: "When I was at Alfreton I used to ring Nigel up when he was in charge of Burton in the Northern Premier I think and he always tried to help me.
"I got to know him very well and he is someone I've got a lot of respect for. He's always picked the phone up to me and that's something I remember, especially as I was a young manager starting out.
"He is a different class as a person and has done very well rising up with Burton, managing Derby and also here at the Lane.
"He had success here, taking the club from bottom of the table to narrowly missing the play-offs, then two cup semi-finals and a play-off semi-final and I'm guessing he will have been disappointed with how it finished.
"But look what he's achieving at Burton, taking them from playing in the Derbyshire Senior Cup to competing and turning over big teams in the Championship."