The Bundesliga and Champions League-winning former Germany international hopes his side can keep hold of the England star for another couple of years
Jadon Sancho can become one of the world's best players and Borussia Dortmund is the best place for him to develop, according to assistant manager Jorg Heinrich.
Sancho has shot to stardom since leaving Manchester City for Dortmund in 2017, scoring 12 goals and supplying 14 assists in 34 Bundesliga appearances last season.
The England forward has continued to shine in the new campaign with three goals and a league-high five assists to his name despite Dortmund's inconsistent form.