Chris Wilder hopes Paul Clement's departure from Reading won't have an effect on Saturday's trip to the Madejski Stadium.
But the Blades chief does have sympathy with the man who would have been in the opposition dugout at the weekend, prior to his sacking on Thursday morning.
Wilder commented: "It won't really affect our preparation at this stage on a Thursday.
"It will be the same group of players, someone might come in and have a new idea, but it will be difficult to implement that in 48 hours.
"Paul's departure shows the toughness of the division and the ramifications of not getting results in a really competitive league.
"They were play-off finalists a short while ago, a penalty away from the Premier League, but they've had a tough season or so since."
The United boss added: "Momentum is key and what we are trying to do is build on it at the right times to take us forward, because it quickly changes the other way as we know at this club too.
"Paul is an outstanding football man, with a fantastic CV. You don't work at the clubs he has without being knowledgeable and having a tactical ability, there are no free jobs and he's been at Chelsea, PSG and Real Madrid to name a few.
"It is a tough industry from a manager's point of view and it's a tough division to compete in from a football club's view."