The Cottagers are bottom of the table with just five points from 11 games.
He said: "I would really be an idiot - a few people think I am, but not that much – to talk about any goal difference before the game.
"I'm not sure how many Fulham games you've watched over 90 minutes - not only Match of the Day or a summary of stuff like that - but this is a really strange situation for Fulham. I can really imagine how they feel in the moment – the football is good, a lot of things are really good, they caused [Manchester] City problems in the Carabao Cup… it's been really good football in a lot of moments.
"We have to defend them. They are a skilled team offensively and tuned in doing a lot of things. The end product, the finishing was maybe not so good often enough but they've scored goals. On the other hand, they've conceded, but you will never score a goal against a team like Fulham with their quality only because you go into the game with the wrong attitude and think about scoring, scoring, scoring.
"This game is a big challenge, really, for all of us. We have to make sure we really don't forget what kind of a good situation we are in.
"Atmosphere-wise, again another challenge, 12 o'clock [kick-off], so for all the people coming into the stadium, go to bed early on Saturday night, be in your best shape on lunchtime on Sunday and help.
"If someone goes there and expects an easy game then please stay at home because it will not be [easy], it will be a really tough job to do. It's good we want to show a reaction, yes it makes sense, but the right reaction."