Jurgen Klopp believes Borussia Dortmund have the style to cause Bayern Munich problems but it will be an "incredibly tall order" to narrow the gap at the top.
League leaders Bayern sit four points clear of BVB heading into Saturday's encounter against their injury-hit opponents.
Klopp's men have not been beaten in the Bundesliga by Bayern since February 2010 and he knows that if they are going to continue their undefeated record at Signal Iduna Park they are going to have to be at their very best.
"We've got a style that can cause problems, but only when we produce it 100 per cent out on the pitch. Just going through the motions isn't enough," he told the Bundesliga's official website.
"You're not going to beat Bayern at the drop of a hat as they have too much quality. They win all these games now and people say: 'Well they made hard work of it, they were a goal down,' but they still win those games even when they are not on top form and that is bad news because when they are form they always win anyway.
"How do you deal with that? We certainly don't think that we have the answer nor that nobody else is up to the job but then along come Dortmund and show the world Bayern can be beaten but whenever you go up against them it is an incredibly tall order."
Dortmund have been heavily affected by injuries, particularly in defence, where Mats Hummels, Marcel Schmelzer, Neven Subotic and Lukas Piszczek will all be sidelined.
New signing Manuel Friedrich has come in as emergency defensive cover and Klopp has underlined the importance of being inpenetrable at the back.
"These days you just can't do this job if you neglect any aspect of the game when the other team has the ball," he continued.
"Bayern Munich don't and you can bet your life Pep Guardiola doesn't. Barcelona's pressing ability was incredible. There were games where I think their centre-back [Carles] Puyol never touched the ball. The players in front of him cleared everything up and they had a team full of attacking midfielders.
"It's nonsense to say Bayern don't do it, they are just the same as us. There's the old saying that strikers win matches and defenders win titles. You can't afford to concede too many goals. It's not just bad in terms of results, it affects your self-confidence as well. It's like taking a knock on the calf or shin, you're not running smoothly afterwards. You've got a bit of a limp."