Niklas Edin, skip of Team Sweden, and his third, Oskar Eriksson, won a record fifth career World Championship.

[8] On April 9, the World Curling Federation announced that a positive COVID-19 test had been recorded by a player on a non-playoff team, and that the second qualification match between the United States and Switzerland would be therefore be postponed.

[9] The World Curling Federation postponed all games scheduled for April 10 due to additional positive tests involving a member of a playoff team.

[10] There were three initial positives from players on non-playoff teams who were tested as part of the exit protocols, and four close contacts were also identified.

[13][10] Enhanced biosecurity protocols were mandated for the remainder of the tournament, including additional tests before and after each game, and requiring masks to be worn on-ice.

[16] The following nations qualified to participate in the 2021 World Men's Curling Championship:[17][18] Pursuant to a December 2020 ruling by the Court of Arbitration for Sport, Russia is prohibited from competing under its flag or any national symbols at any Olympic Games or world championships through December 16, 2022, and must compete neutrally.