This was the 7th appearance of the event as a full medal event. Badminton was introduced as a demonstration sport in 1972, held again as an exhibition sport in 1988, and added to the full programme in 1992; the mixed doubles tournament was not held in 1992 but has been held since 1996.[4]
The badminton qualification system provided for 16 mixed doubles teams (32 players). Following revisions due to the COVID-19 pandemic, the qualifying periods were set between 29 April 2019 to 15 March 2020 and 4 January to 13 June 2021, with the ranking list of 15 June 2021 deciding qualification.
Qualification was done entirely through the ranking list. Nations with at least two pairs in the top 8 were able to send a maximum of 2 pairs (4 players); all other nations were limited to a single pair. Pairs were taken from the ranking list in order, respecting those national limits, until 16 pairs were selected. However, each continent was guaranteed to have at least one pair with the lowest-ranking pairs displaced if necessary to make room for a continental guarantee.
Competition format
The tournament started with a group phase round-robin. There were four groups of four teams each; the top two highest-ranked pairs from each group would move on to a knockout stage.[5] The knockout stage was a three-round single-elimination tournament with a bronze-medal match.[6]
Matches were played best-of-three games. Each game was played to 21, except that a pair must win by 2 unless the score reached 30–29.[6]
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