According to Italian journalist Skira, Kostic returned to Juventus and participated in the Club World Cup with the team.

Kostic was loaned to Fenerbahce by Juventus this season, and the loan contract expired on June 30. Skira revealed that the 32-year-old full-back left Fenerbahce and returned to Juventus early to participate in the Club World Cup with the team.

Kostic played 35 games for Fenerbahce this season, scoring 2 goals and assisting 9 times.