Arsenal skipper Laurent Koscielny has been attracting the interest of several clubs this summer as his stay in North London gradually comes to an end.
The 33-year-old has one year left on his current deal with the Gunners and new contract talks with senior club officials have hit the rocks, meaning that his future at the Emirates Stadium is not crystal clear.
Amidst the interest in him from other European clubs, Arsenal have slapped a £10.6m asking price on him.
The French defender is one of the longest serving players at Arsenal having been at the club since 2010 when he signed for the Gunners from French Ligue 2 club Lorient.
He has won three FA Cup titles during his time at Arsenal.
The 33-year-old has done well to battle back to fitness after a long-term Achilles problem in April 2018.
Borussia Dortmund have targeted the signing of defenders this summer and the Germans want to sign Koscielny to boost that area.
Dortmund had a nice lead over Bayern Munich at the halfway stage but their defensive issues haunted them as they capitulated to give Bayern a seventh successive league title last season.
Borussia Dortmund Starting XI (4-4-1-1): Roman Burki; Raphael Guerriero, Laurent Koscielny, Mats Hummels, Manuel Akanji; Axel Witsel, Thomas Delaney, Jadon Sancho, Marco Reus; Mario Gotze, Thorgan Hazard