[2] Twenty four teams from 13 regions qualified for the tournament based on their placement in regional circuits such as those in China, Europe, North America, South Korea and Taiwan/Hong Kong/Macau with twelve of those teams having to reach the main event via a play-in stage.

[3][4] A virtual rap group named "True Damage" was unveiled by Riot Games during the ceremony, with Soyeon from (G)I-dle, Duckwrth, Thutmose, Keke Palmer and Becky G representing the group as its human counterpart and in the live performance of their debut song, "Giants", in the finals.

[5] Based on the results of the Mid-Season Invitational and the World Championship in the year prior, with the 2018 MSI victory of Royal Never Give Up and 2018 Worlds victory of Invictus Gaming, the third seed team from China (LPL) will start in the group stage, replacing the third seed team from South Korea (LCK) that will now instead begin in the play-in stage.

[6] Due to the merger of Latin America North's and Latin America South's professional leagues into a single league (LLA) and the results of the 2019 Mid-Season Invitational, Vietnam (VCS) will have a direct spot in the group stage for the summer champions and an additional spot in the play-in stage for the summer runner-up, the same format used in 2017 Worlds.

[7] Berlin, Madrid, Paris were the three cities chosen to host the competition.