"This will be our toughest test by far because Sheffield United are one of the strongest teams in this division," said Coleman to the CT.
"They are unbeaten, very, very physically strong and organised, and Kevin Blackwell has strengthened his squad since reaching the play-off finals, so this will be a really big test. 
"They don't come much harder but we will go into it with a bit of encouragement from Saturday.
"When we played them at home last year we weren't thinking about Sheffield United.
"I was, I can promise you that, but I don't think anyone else was, and I don't just mean the players, because four days after that we were playing Chelsea.
"We are not playing Chelsea this Saturday so there are no excuses this time. I am really looking forward to it and I am prepared for it."
Kick off is at 7.45pm.