[6] On 3 September, the Turkish Football Federation announced that all games during the first half of the Süper Lig season, would be played behind closed doors due to the COVID-19 pandemic in Turkey.

[11] On 2 October, Beşiktaş announced the signing of Valentin Rosier on a season-long loan deal from Sporting CP.

[13] On 1 February, Beşiktaş announced the return of Cenk Tosun on loan for the remainder of the season, and the permanent signing of Bilal Ceylan.

[14][15] Also on the same day Jeremain Lens, Tyler Boyd, Erdoğan Kaya and Güven Yalçın all the left the club on loan, whilst Nicolas Isimat-Mirin's contract was terminated by mutual consent.

[16][17][18][19][20] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.