He was, however, suspended for a match last month for "disciplinary reasons", and Zorc revealed his poor time-keeping was an issue club bosses were struggling to resolve.

"Auba is a special player ... he is extravagant and a colourful character. That does a city like Dortmund a lot of good," Zorc was quoted by Sport Bild as telling Sky programe 'Wontorra-Talk'.

"We have only one problem with him - that is punctuality. We have to be very clear about that."

Zorc added: "This crept in last year, that he often arrived too late. His pal (Ousmane) Dembele (who moved to Barcelona in the summer) was right there.

"Then, as a club, you have the problem of how to handle it. I don't believe that we can completely get rid of it, but we can handle it fine."

Aubameyang's scoring form has seen him repeatedly linked with a host of clubs across Europe and speculation about his future will no doubt surface again in January.