Borussia Monchengladbach are targeting Tottenham defender Kevin Wimmer.
With Alvaro Dominguez having announced his retirement this week, BILD says Gladbach chief Max Eberl wants to find a replacement in January.
"Alvaro's retirement of course meets us unprepared, because we were not expecting it," said Eberl.
"We have the market in mind."
Wimmer is high on Eberl's shopping list, though is not alone with Robin Knoche (Wolfsburg) and Fabian Schär (Hoffenheim) also under consideration.