David Weir is keen to iron out United's defensive frailties ahead of Saturday's clash with Brentford at Griffin Park.
The Gaffer was concerned about the way United conceded both goals in the Capital One Cup defeat at the hands of Burton Albion and insists standards must improve.
Analysing aspects of the reversal in greater detail, Weir remarked: "We want to get the ball moving at a good pace and playing with a good tempo, but as I keep emphasising, it has to be done in a positive manner.
"We need to get that winning mentality into the lads, get them to keep doing the basics right and doings the right things at the correct times, in good areas.
"There is no hiding place as a defender; both goals were frustrating and, in our opinion, avoidable.
"We have to address certain defensive situations better so it will be a busy few days on the training pitch ahead of Brentford on Saturday."
The Blades boss reserved special praise for Liverpool loanee Conor Coady, though, adding: "I thought he did well. He is mobile, can see a pass and, more importantly, pick one. He is a creative player and in time he will be a real asset to us.
"The lad is adaptable and has several good attributes; he is versatile and will certainly improve the more he plays."