BIG-HEARTED Borussia Dortmund star Marwin Hitz has taken time off between matches to donate stem cells to a stranger battling leukaemia. DKMS Germany uploaded a photograph to Instagram at the weekend showing Dortmund's Swiss goalkeeper in a hospital bed preparing to donate. Borussia Dortmund star Marwin Hitz has donated stem cells to a stranger battling leukaemiaCredit: Instagram @dkms_de Hit...Full Story »