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

The season covered the period from 5 August 2020 to 30 June 2021.

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

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

The group stage draw was held on 1 October 2020.