Chris Wilder felt the Blades deserved to take all three points from Saturday's goalless draw against Ipswich Town.
United were the better side on a testing playing surface at Portman Road and came closest to a winner when James Wilson hitting the post with a dipping effort.
The Blades boss remarked: "I thought we deserved more because our performance was excellent.
"The pitch, for both sides, meant you weren't able to play the ball round, so we knew it would be a very competitive game.
"It was two honest teams going at it, but we've got to score when we have those golden opportunities in the second-half, but I can't fault the players effort.
"We're tired, we've had four away games on the bounce, some long journeys and that's the relentlessness of the Championship that we often talk about."
Wilder added: "My players have picked themselves up and gone again after Fulham and Ipswich had little in the way of chances, whereas we have, Wilson has hit the post and we've had two or three other real opportunities to score.
"The attitude of the players was absolutely brilliant, Enda and George have got in good areas and we can't do more than create numerous chances to score goals.
"Second-half we dominated it and bossed, always knowing they are a dangerous side, with the quality players they've got.
"We didn't deserve to draw, we deserved to win, but you have to accept what you're given and we move on to Tuesday."