The 2021–22 FA Cup was the 141st season and marked the 150th anniversary of the first Football Association Challenge Cup, the oldest football tournament in the world, started in the 1871–72 season. It was sponsored by Emirates and was known as the Emirates FA Cup for sponsorship purposes.

Amalgamated Football Club Sudbury is a football club based in Sudbury, Suffolk, England. The club was formed in 1999 by the merger of Sudbury Town and Sudbury Wanderers, the process giving rise to the name Amalgamated Football Club Sudbury. and went on to win the Eastern Counties League Premier Division five seasons in a row as well as reaching the final of the FA Vase in three successive seasons, records for both competitions. They are currently members of the Southern League Premier Division Central and play at the King's Marsh Stadium in the Ballingdon-Brundon area of Sudbury.