Chris Morgan insists Tuesday's League One clash with Peterborough United is the Blades sole focus, despite Sunday's FA Cup quarter-final being on the horizon.
The United coach remarked: "Of course everyone (including the fans) are looking forward to Sunday, but we have to respect Peterborough and be right at it from the first minute.
"The players need to go out there and show the Gaffer they should be on the teamsheet for the quarter-final against Charlton Athletic, but we can't afford to get ahead of ourselves."
Morgan feels United can take plenty of heart from the performance in the corresponding fixture at London Road in October, adding:
"Earlier in the season we went there and really dug in. We were in deep trouble at the time and they were flying and scoring a lot of goals.
"We defended for our lives and got a deserved point. Looking back I think we had the best chances to win the game, so we are confident we can cause them problems again."
But Morgan says over confidence won't become an issue: "We are playing with a real belief and optmisism, both at home and on the road, but particularly at Bramall Lane.
"We are confident but not arrogant, the moment we show any complacency is the time we will get our legs chopped from underneath us.
"The principles are constantly drummed into the players and it is there responsibility to respond positively which they have done since the defeat at Crewe."