The midfielder’s contract with the Bundesliga side is out of contract in the summer.
“I wanted to keep that one quiet. But you can’t keep any secrets in the world we live in,” admitted Strachan.
“We’ve watched the player a lot in the Bundesliga and official talks will begin when the window opens in January.
“He has been on the radar for a while but I won’t know how the player feels about us until I meet him.”
