The player's father, Thierry, has confirmed Blues boss Jose Mourinho wants to send him away on-loan again next season.
"Thorgan must have a guarantee that he gets enough playing time. This is essential so that he can continue to develop steadily," said Thierry.
"German clubs have spoken to him."
Hazard won the Belgium Player of the Year last season while on-loan with Zulte Waregem.
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