The Borussia Dortmund coach believes his side will have to work hard in Saturday's home clash with Sami Hyypia's side, and is hoping for a fresh start after the international break
The champions have endured an unspectacular start to their campaign so far, beating Werder Bremen at home in their opening game of the season, before a disappointing draw at Nurnberg.
However, the Ruhr outfit's trainer believes that it would be unfair to draw too much from the latter result at such an early stage.
"[Dortmund do not] have to win every time we come to Nurnberg," the 45-year-old told reporters. "The end of the international break? It means the season starts from scratch for every team.
"[Leverkusen] will be uncomfortable [opponents]. We also want to be a problem to them. Less so through our pre-match announcements than by what we do on the pitch.
"We must be willing to work incredibly hard and sometimes that will mean chasing the ball. We've got an incredible number of options [up front] and we will use our knowledge and belief to find the right combination."
Dortmund will have a fully-fit squad to choose from on Saturday, other than Patrick Owomoyela, with Marco Reus having recovered from a knock sustained on international duty.