Tony McMahon is predicting that Saturday's fixture against Notts County will be United's toughest game in League One to date.
The Magpies arrive at the Lane sitting in second place in the table, but McMahon believes the Blades are ideally positioned after a solid unbeaten start.
"Personally things couldn't have gone much better, the team is doing well, we are unbeaten and I am playing every week," said the former Middlesbrough player.
"As a professional footballer you always enjoy your football more when you are winning and that is why I came here because I thought this club would be challenging for promotion.
"Saturday is probably going to our toughest game so far. Notts County have started well and will expect to be there or thereabouts at the end of the season."
The experienced defender, still only 26, also believes the Blades are capable of dealing with the level of expectation surrounding every fixture, adding: "Playing Sheffield United is a big game for a lot of teams in this league, I am not being disrespectful but many come and sit back because they are happy with a point.
"We are always trying to turning those draws into wins and achieving those results will be crucial as the season progress."