He said: "We are facing a Sheffield United team that look much more like a Chris Wilder Sheffield United team, when they got promoted under him.
"The last four games, they have been very much in form, great performances, very good results as well: 2-2 against Chelsea, Liverpool only just beat them at Anfield, 3-3 against Fulham, and 2-2 against Bournemouth.
"They have more fight and they are more difficult to beat. They are doing everything I would expect from a Chris Wilder team."
"Speaking of Chris (Wilder), I think he's done a very good job in general, and we're seeing what he's building at the club now.
"So I expect a difficult game, but it needs to be about us and it needs to be us that plays with tempo and intensity. It needs to be on us to perform. It needs to be us that goes out there and does the job.
"We need to come out flying and we do that together with the fans - they were very good against Manchester United and Brighton - they need to be bang on it again."