In addition to the domestic league, Beşiktaş participated in this season's editions of the Turkish Cup and the Turkish Super Cup.

9 December, Head Coach Sergen Yalçın left his position by mutual consent.

[1] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

Source: See Results The draw for the group stage was held on 26 August 2021.