Borussia Dortmund chief Michael Zorc insists Jadon Sancho is not for sale.
The former Manchester City has been linked with a return to England.
But Zorc told BILD: "Jadon Sancho will stay with us in the next season.
"He has great quality and is a bet for the future, he will remain in Dortmund."
After the first half of the season, Sancho boasts seven goals and ten assists in 24 appearances.