Slaven Bilic is preparing to give Atınç Nukan his first start of the season in this weekends clash against Istanbul rivals Kasimpasa.
Besiktas are facing a crisis in defence with Sivok being ruled out due to an injury and Pedro Franco missing this weekends game with a suspension.
Ersan Gulum who suffered a hamstring injury while on international duty is also a doubt for the game.
Bilic is set to start with Atınç and Necip in defence with Ramon Motta and Serdar Kurtulus on either side.
The former Croatian national team manager has been working closely with the young centre back in training this week.
Atınç has only made five appearances for Besiktas in his career. The 21-year-old made his professional debut on 7 May 2010 against Manisaspor.