Norwich City are reportedly interested in making a move for Besiktas defender Domagoj Vida.
Daniel Farke's Canaries have been heavily linked with bringing in defensive reinforcements in January after conceding 26 goals in 11 Premier League games this season; only Southampton have let in more.
According to reports in Turkey, Norwich are planning on tabling a €10m (£8.6m) bid for the Croatian international, who is under contract with the Turkish side until 2022.
While Besiktas are believed to be open to selling the defender, they are thought to want a sum in the region of €13m (£11.2m) for his services.
Vida, formerly of Dynamo Kiev and Dinamo Zagreb, has scored two goals in 12 games for the Black Eagles this season.