Nigel Clough says he will be encouraging his players to 'go out there and give it a go' in Wednesday's Capital One Cup semi-final second-leg clash with Tottenham Hotspur at Bramall Lane.
Andros Townsend's penalty is all that separates the two teams and Clough is optimistic his troops will be able to use a sell out home crowd to their advantage on what promises to be a special night under the floodlights at the Lane.
He remarked: "We are pleased with how we have managed the occasions in cup competitions, barring 10-15 against Hull which proved costly, but that is the lesson to learn.
"The higher you go the more you get punished for mistakes, what we can't afford is to make any on Wednesday night, because that will make our task very, very difficult.
"We are not settling for this last four spot, but it hits home what you have achieved just seeing the other three teams in the semi-finals.
"It can be a bit surreal sometimes, it can appear a bit scary at times, but let's not fear anything, let's go out there and give it a go. Look at what Bradford and Middlesbrough did in the FA Cup on Saturday."
On the 25,000 United supporters that will be packed in on Wednesday night, Clough is asking for more of the same in terms of backing and he hopes his players leave everything they have got in the tank on the field, meaning they have no regrets whatever the outcome.
He concluded: "We won't have to say anything to the fans, they were amazing at Preston, the numbers we saw when we walked out at Deepdale were staggering really.
"But they have been with us and backed us in incredible numbers since Aston Villa away over 12 months ago, so I am sure they will get right behind the lads from the first whistle through to the last.
"Our final message to the players will be make sure you do everything possible, if you do and it isn't quite enough then that's accepted, but the worst thing as a footballer is coming back into the dressing room thinking what might have been."