The England star, valued by Dortmund at £100million, has been linked with a move to Manchester United and other leading clubs.
"If Jadon left, we would do something again in the offensive area," Zorc told Kicker.
"There are certainly one or two players we are targeting."
Reports in Germany this week suggested that Dortmund have set United a deadline of August 10 to decide whether they want to sign Sancho and make an offer.
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