Tournament:CEO 2021

CEO 2021, officially Community Effort Orlando 2021, was a major tournament and the 11th edition in the tournament series, a fighting game tournament held annually in Central Florida, and organized by. The tournament was held on December 3rd-5th, 2021, at the Wyndham Orlando Resort International convention center in Orlando, Florida. Unlike previous iterations, Super Smash Bros. Ultimate singles was the sole Super Smash Bros. event at the tournament.

Super Smash Bros. Ultimate singles
(777 entrants) Top 24 Bracket Top 8 Bracket

Trivia

 * After the seeding for the tournament was finalized, several top players, including, , , , and , dropped out due to various reasons.
 * During the second day, the fire alarm was pulled by someone outside of the tournament, prompting the organizers to evacuate everyone from the building. While everyone was outside, a rock-paper-scissors tournament was held.