Speaking at the club's AGM, Watzke said: "I would like us to get a complete picture of their opinions."
The three-year deal, announced in May which includes marketing, advertising and hospitality arrangements, and is reported to be worth 20 million euros ($19 million), has prompted criticism from Dortmund fans and further afield.
On Sunday, members spoke out against the sponsorship, with some having constructed mock tanks and an instruction stand with information about the deal.
In a non-binding vote on the first day of the AGM... Читать дальше...