Weidenfeller hung up his gloves at the end of last season after 16 years with Borussia Dortmund and is close to Klopp, who managed him during seven of those 16 seasons.
It was confirmed on Wednesday that Klopp will manage one of the sides in the match which will see a Dortmund XI face an Allstars XI at the Weastfalenstadion.
Klopp is also expected to feature in the game after the following video was released last week:
July 27, 2018
Should Klopp feature, it reamins to be seen if he will be fielded up front or in defence, having played in both positions during his career, most of which was spent with Mainz.
Such is Weidenfeller's standing with Dortmund that over 50,000 tickets have already been sold for the game.