Speaking following Wednesday night's stalemate with Birmingham City, boss Chris Wilder acknowledged the Blades weren't at their fluent best.
He remarked: "It wasn't a free-flowing performance, not by a long shot. The last two home performances has seen us produce one that thrilled so many people and possibly one that hasn't, but Birmingham did a job on us.
"We feel slightly fortunately to escape with a draw late on, but that wasn't down to me or their shape or style, it was the mistakes we made and us getting sloppy."
But there were positives to take from the first draw of the season, according to the boss.
Wilder added: "It's a quick turnaround with Preston playing Tuesday and us 24 hours later and I made a decision to a number of changes, we have to utilise the squad and we've come away with a point.
"We wanted energy down the flanks, legs at the top of the pitch and Flecky's been outstanding. Kieron (Freeman) has done nothing wrong, neither has Enda (Stevens), Billy (Sharp) or David (McGoldrick).
"Marvin and Conor have got to integrate into our style, both showed glimpses coming into the team and both will improve."