German media outlet Sport Bild understands that Borussia Dortmund are looking at Aleksandar Dragovic and Omer Toprak.
The Millionaires have come to terms with losing star defender Mats Hummels to arch rivals Bayern Munich and they are now in the market for his replacement.
Sport Bild has learned that Dynamo Kiev centre-back Aleksandar Dragovic and Bayer Leverkusen stopper Omer Toprak are top of their hit-list.
The Austrian defender has been on the radar of top European clubs for quite some time and he is widely expected to leave Ukraine for greener pastures in the summer transfer window.
Meanwhile, chances are that Bayer Leverkusen will not be interested in selling their prized asset to Bundesliga rivals, meaning the Turkey international may be out of their reach.
At the same time, the Millionaires are building towards the future, with Timo Werner, Oliver Torres and Youri Tielemans some of the talented youngsters on their radar.