The 25-year-old's contract with the German side expires at the end of the season.
Birmingham City have taken Arminia Bielefeld defender Felix Burmeister on trial, according to German newspaper Bild, as Gary Rowett looks to strengthen his options heading into the second half of the season.
The 25-year-old's contract with the German second division side expires at the end of the campaign (via Bild), and while he was an important member of the side that would clinch promotion last season, he has found opportunities much more difficult to come by this term.
The centre-back has played just three games in the league this season, with two of those appearances coming from the bench.
Despite boasting a relatively thin squad, Rowett has taken the Blues to the cusp of the play-off positions - Birmingham sit eighth in the Championship, two points behind Ipswich, who currently occupy that final top six spot.
Much of their success has been based around a defence that has been very difficult to break down this year. In their last six games, they have managed to keep three clean sheets, including one in the stalemate with current table-toppers Middlesbrough.
And if they wish to stay in the play-off hunt, it may be the Blues' ability to shut out sides that determines whether they continue to surprise everyone by sneaking into the top six. But with a small squad to choose from, Rowett will know that unless they make additions during the January window, they could be relying on a lot of luck where injuries are concerned.
And having handed a trial to Burmeister, it appears that he's not looking to take a chance on the key men in his squad remaining injury-free.