Chris Wilder believes Saturday's clash against Millwall will be one where both sides go all out to win the game.
Looking ahead, Wilder commented: "It's a great opportunity for both clubs, both teams have put themselves in fantastic positions and I've got great respect for what Millwall have done since Christmas.
"They've recruited very well and not much has changed from the way they played last season.
"Up top they've got a partnership and a combination that has proved they can succeed in the Championship, but they've got much more than that, they're a very strong group."
Wilder added: "We play differently to Millwall, but like us they go for the jugular and to win games, both have got an excellent team ethic and we probably do have other similarities."