But Zorc says there has been no contact from any club regarding a deal for Brandt.
Asked about rumours that talks are advancing with Arsenal, Zorc said: “I read that too, I can’t say more about it.
“No one has contacted us, there is nothing on the table – and not even in the fax machine.
“That’s all I can say.”
Brandt only joined Dortmund from Bayer Leverkusen in the summer of 2019 for a fee similar to what Arsenal would have to pay for him now.