Bio-secure bubble

A bubble was established for a single sports season, tournament, or for an ongoing series of events, allowing them to still be held and made available to broadcast audiences.

A bio-secure bubble typically consisted of multiple sites comprising a secure perimeter (often within close proximity to each other), including player residences (such as hotels), training facilities, and the venue proper.

[17][18][19] The July 2020 test series between England and West Indies was conducted as a bubble, with players staying in a hotel on-site.

[29][30] Major League Soccer conducted an in-season tournament—the MLS is Back Tournament—at a bubble within the ESPN Wide World of Sports Complex.

[32] The Philippines Football League is noted for hosting its 2020 season in just under two weeks under a bubble with a downsized format, due to financial and logistics issues caused by the pandemic.

[37][38] In December 2020, WWE relocated to Tropicana Field in St. Petersburg, Florida, as Amway Center was needed by the arena's sports tenants.

[42][43] In July, AEW began experimenting with invited guests in selected seating areas for a plan towards allowing ticketed spectators.

In August, with NASCAR Holdings having successfully held two Daytona International Speedway race meetings (one IMSA and one NASCAR) and one IMSA meeting at Sebring International Raceway, AEW began to readmit a limited number of fans (10–15% venue capacity),[44] with a gradual increase in spectators running frequently before running full capacity shows in May 2021.

[52][53] Major League Baseball eventually decided to use a neutral site model for its 2020 postseason in order to reduce the chance of further disruption, with games split between venues in California and Texas beginning with the Division Series round, and the 2020 World Series held at Globe Life Field in Arlington, Texas.

[57] Concerns have been raised over "bubble fatigue", as players are isolated from their families and the outside world for an extended period of time until the event concludes or they are eliminated.

[58][59] IPL player Shikhar Dhawan described the experience as being "almost like Bigg Boss [the Indian version of Big Brother]", and a test of his "mental strength".