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The 2021–22 World Rugby Sevens Series was the 23rd annual series of rugby sevens tournaments for national men's rugby sevens teams. The Sevens Series has been run by World Rugby since 1999. The series was won by Australia, claiming their first World Series title. Second-placed South Africa opened the competition by winning the first four tournaments, with a 36 match winning streak that lasted until the 2022 Singapore Sevens where they were beaten by the United States in pool play, but they did not make the semifinals in any of the remaining events.