An unexploded World War II bomb was found near Dortmund's stadium on Thursday, two days before their match with Schalke.
Jurgen Klopp was left frustrated with Borussia Dortmund's defensive blunders in their 2-1 defeat to Juventus.
Juventus will take a slender lead to Dortmund for their Champions League last-16 second leg after a 2-1 home win.
Jurgen Klopp insists Borussia Dortmund's poor league form will not affect preparation for their Champions League clash.
Borussia Dortmund defender Neven Subotic claims Marco Reus' decision to commit to the club has revived their form.
Juventus are full of confidence ahead of their clash with Borussia Dortmund, coach Massimiliano Allegri said.
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