Borussia Moenchengladbach boss Lucien Favre has refused to comment on reports linking die Fohlen with a move for Chelsea midfielder Marko Marin.
The 23-year-old joined the Blues in an €8 million move from Werder in the summer, but has had a slow start to his career at Stamford Bridge.
After failing to make a single Premier League appearance for the Stamford Bridge outfit, Marin has been linked with a return to Bundesliga.
Borussia M’gladbach are believed to be pondering a loan deal for the former Germany international, even if coach Lucien Favre is reserved over the transfer talk.
Marko Marin missed the start of the season through injury, but has made just one Capitol One Cup appearance despite returning into action a couple of months ago.
Before joining Chelsea, the midfielder scored 8 goals in 87 Bundesliga appearances for Werder Bremen.