The German is also a target for former club Hannover.
Baumann told Bild: "In the course of Serge [Gnabry's] transfer, we also talked about his [Mertesacker's] future.
"I can see Per at Werder."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!