In addition to the domestic league, Slovan Liberec participated in this season's editions of the Czech Cup and also participated in the UEFA Europa League.

The season covered the period from 1 July 2020 to 30 June 2021.

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

Players may hold more than one non-FIFA nationality.

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