The Russian Computer Sports Federation announces the format of the matches of the main stage of the competition, which will be held from October 23 to November 14, 2021. The main stage of the Open Cup will be divided into two stages: the group stage and the playoff stage. The group stage matches will take place on 23, 24, 30 and 31 October 2021. The playoff matches will take place on November 6, 7, 13 and 14, 2021.