Union Berlin are said to be in talks with Juventus and Italy defender Leonardo Bonucci.
According to Gianluca Di Marzio and Fabrizio Romano, among others, Union have opened talks with the 36-year-old Juventus centre-back.
The veteran defender looks set to leave Juventus this summer after being deemed surplus to requirements by the Serie A giants.
The Italy captain has made a total of 502 appearances for Juventus and has 121 caps for his country.
Union Berlin have also been linked with another Serie A player, Germany international Robin Gosens, who is believed to be close to joining the club from Inter.