Sport in Brunei covers the variety of sports that are played, from amateur to professional levels, across the sultanate of Brunei Darussalam, in addition to individuals and teams who are sent to compete in tournaments both home and abroad. Association football is the most popular sport played in Brunei. Several sports, along with leisure activities are also partaken in Brunei; from badminton and swimming to horseback riding, mountain biking, and paintball.
The World Aquatics Junior Swimming Championships is an international swimming championship event organized biennially by World Aquatics for swimmers aged 14–18 years as of the 31st December of the year of the competition. It is usually held on odd years. Prior to 2023, the event was known as the FINA World Junior Swimming Championships and was open to female swimmers aged 14–17 and male swimmers aged 15–18 as of the 31st of December of the year of the competition.
Zhang Yufei is a Chinese competitive swimmer who specializes in sprint freestyle and butterfly events. Considered one of the most promising swimmers in the international scene, she produced a tally of thirty-seven medals in her swimming career, spanning the Youth Olympics, Asian Games, World Championships and the Summer Olympics. In 2023, she was named as the most valuable player in the women's division, in the 2022 Asian Games in Hangzhou.
Mongolia competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. Since the nation's debut in 1964, Mongolian athletes have appeared in every edition of the Summer Olympic Games, with the exception of the 1984 Summer Olympics in Los Angeles, because of its support of the Soviet boycott.
The women's 4 × 100 metre freestyle relay event at the 2022 Asian Games took place on 24 September at the Hangzhou Olympic Sports Expo Center.
