Koper has confirmed the signing of Stefano Surdanović, a 27-year-old Austrian midfielder of Serbian origin who last played for Zrinjski. Surdanović moves to the club on a free transfer after his contract expired. He joined Zrinjski in August 2024 and made a total of 57 appearances during his two seasons in Bosnia and Herzegovina. In the previous season, he made 17 appearances in the Premijer Liga BiH, mostly as a substitute, and started only five league games. Surdanović, who is Koper's third signing of the transfer window, has signed a two-year contract with the club's management. According to Transfermarkt, his current market value is €400k.