Rabbi Matondo has rejected a new contract offer from Manchester City.
The Sun says he could be the next youngster to leave the Etihad.
Pep Guardiola has lost Brahim Diaz to Real Madrid and now has one of his brightest Academy prospects targeted by German clubs.
The 18-year-old, capped by Wales, has a full season left on his current deal but fresh terms have not been agreed.
Bayern Munich, Borussia Dortmund, Borussia Monchengladbach, and RB Leipzig all watched the forward play in a UEFA youth clash against Hoffenhiem earlier in the season.
And City ideally don't want youngsters running down their contract like Spain Under-21 star Diaz.