CEO Hans-Joachim Watzke says the club has not received any offers from Manchester United for the England international.
And sporting director Michael Zorc added that he expected Sancho to return to preseason training next week.
"I assume that Jadon will go to the training camp on Monday and play with us this season," he told SZ.
The Dortmund hierarchy could be keeping their cards close to their chest about Sancho, especially when United's interest in Sancho has been confirmed by multiple sources.
The Red Devils still have plenty of time to get a deal done as the transfer window expires on October 5.