Nigel Clough believes the Blades recent league victory over Crewe Alexandra at Gresty Road will count for nothing when the two sides clash at the same venue in the FA Cup on Saturday.
Looking ahead to the tie, Clough admits everyone would love another memorable cup run, which culminated with a semi-final appearance at Wembley in April, but admitted winning promotion to the Championship remains the main aim this season.
Speaking ahead of the tie in Cheshire, the Gaffer commented: "I think the manner of our performance in the league fixture where we dominated and should have won more comprehensively could be a hindrance at the weekend because Crewe might see it as something of a free game.
"League form goes out of the window in the cup and it could be a totally different game on Saturday, they aren't playing for valuable points and they might just come out with the pressure and give it a real good go.
"It would be lovely for us to have another notable cup run, but let's get through a couple of rounds and see what happens from there.
"But getting to the semi-finals, especially as a League One Club is a one-off, although it was an experience nobody connected to the Club will ever forget and if we could go some way to replicating those special occasions then great, but the league will always be our priority.
"We have the FA Cup on Saturday and the JPT on Wednesday, in an ideal world, given the consistency of our performances we would like to be playing league games and racking up the points.
"Promotion is the aim this season, the importance of cup competitions lessens ever so slightly, but it won't come 3pm on Saturday."