“It could be that it is ok in a few days. We will check it again on Thursday and see.”
Four points off leaders Bayern Munich, the Ruhr valley club must bounce back following two matches without a win in the past six days, if they are to stay in touch with the top.
To do that they will somehow need to cover the gaping hole in attack left by Haaland’s absence.
“Until 11 or 12 months ago we were also playing without him,” Dortmund sports director Michael Zorc said. “But obviously this hurts us now.”
“Now it is up to the others to deal with it. We now need to become a bit more flexible and compensate for his scoring ability,” he said.
Champions Bayern Munich host second-placed RB Leipzig, who will leapfrog into first place with a win.
Bayern, on 22 points, are currently two ahead of Leipzig, who joined the Bavarians in the Champions League knockout stage after Tuesday’s 4-3 win at Istanbul Basaksehir.