Neill Collins has acknowledged the Blades must kick-off a run of three successive home fixtures with a win, but has warned against complacency on Tuesday night:
"Crawley Town perhaps doesn't sound the most glamorous fixture but we mustn't underestimate them. It is a cliché but they will relish their trip to Bramall Lane and given their result at the weekend, it shows they are resolute.
"Under Richie Barker, Crawley have a lot of good young players who continue to adapt to the demands of this division. They play an attractive brand of football and have several dangerous, attacking players.
"Some people might expect us to just turn up and roll Crawley over, but we are preparing ourselves for another tough fixture."
Collins rubbished speculation about it being more difficult facing teams who have 'nothing' to play for, the defender concluded:
"I never believe in the talk of playing a team who has nothing to play for. As a footballer and, no doubt, as a manager you have professional pride to play for at all times.
"We aren't looking beyond Tuesday night, but certainly a win would give everyone a huge lift ahead of the games with Swindon and Brentford."