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.
Yuliya Andreyevna Yefimova is a Russian competitive swimmer. She is the Russian record holder in the 200 metre individual medley, 50 metre breaststroke, 100 metre breaststroke, and 200 metre breaststroke. After making her Olympic debut in 2008, she went on to win the bronze medal in the 200 metre breaststroke in 2012, and silver medals in the 100 metre and 200 metre breaststroke in 2016. She is a six-time World Champion, winning the 50 metre breaststroke in 2009 and 2013, the 100 metre breaststroke in 2015, and the 200 metre breaststroke in 2013, 2017, and 2019. In 2019, she became the first woman to win the 200 metre breaststroke at a FINA World Aquatics Championships three times. She is a former world record holder in the long course 50 metre breaststroke. She has won 109 medals, including 48 gold medals, at Swimming World Cups.
The men's 200-metre butterfly event at the 2001 World Aquatics Championships took place between 23 July – 24 July. Both the heats and semifinals were held on 23 July with the heats being held in the morning session and the semifinals being held in the evening session. The final was held on 24 July.
The men's 50 metre freestyle event at the 2001 World Aquatics Championships was held on 22 and 23 July 2001 (final) at the Fukuoka, Japan.
The men's 100 metre freestyle event at the 2001 World Aquatics Championships took place 27 July. The heats and semifinals were held on 26 July.
The men's 50 metre backstroke event at the 2001 World Aquatics Championships took place 25 July. The heats and semifinals took place 24 July, with the final being held on 25 July.
Emma Jennifer McKeon, is an Australian competitive swimmer. She is an eight-time world record holder, three current and five former, in relays. Her total career haul of 11 Olympic medals following the 2020 Olympic Games made her Australia's most decorated Olympian and included one gold medal from the 2016 Summer Olympics in Rio de Janeiro and four gold medals from the 2020 Summer Olympics in Tokyo. With four gold and three bronze medals she was the most decorated athlete across all sports at the 2020 Summer Olympics, and tied for the most medals won by a woman in a single Olympic Games. She has also won 20 medals, including five gold medals, at the World Aquatics Championships; and a record 20 medals, including 14 gold, at the Commonwealth Games.
Abbigail "Abbey" Weitzeil is an American competition swimmer specializing in sprint freestyle. A multiple time Olympic medalist, she won a gold medal in the 4x100-meter medley relay for swimming in the preliminary heats and a silver medal in the 4x100-meter freestyle relay at the 2016 Rio Olympics. At the 2020 Summer Olympics she won a silver medal in the 4x100-meter medley relay and a bronze medal in the 4x100-meter freestyle relay, swimming in the final of both events. She is the American record holder in the 50-yard freestyle and is part of the American Record in the 4x100-meter freestyle relay.
Evgeny Mikhailovich Rylov is a Russian competitive swimmer and Olympic champion specializing in backstroke events. He won three gold medals at the 2014 Summer Youth Olympics in Nanjing, and a bronze medal at his senior international debut at the 2015 World Championships in Kazan. He also won a bronze medal at the 2016 Summer Olympics in Rio de Janeiro and a gold medal at the 2017 World Championships in Budapest, both were in the 200 metre backstroke event. In 2018, at the 2018 World Short Course Championships, he won gold medals in the 200 metre backstroke and 50 metre backstroke. At the 2019 World Championships, he won a gold medal in the 200 metre backstroke, silver medal in the 100 metre backstroke, and silver medal in the 50 metre backstroke. He won the gold medal in the 100 metre backstroke and 200 metre backstroke at the 2020 Summer Olympics in Tokyo.
Kristóf Milák is a Hungarian swimmer. He is the current holder of the world record in the long course 200 metre butterfly and the European record in the long course 100 metre butterfly. He also currently holds the Hungarian record in the short course 50 metre backstroke. At his first Olympic Games, the 2020 Summer Olympics, he won a gold medal in the 200 metre butterfly and a silver medal in the 100 metre butterfly. He has also won three gold medals and one silver at the World Aquatic Championships, as well as three gold medals at the European Aquatics Championships. He was the gold medalist in the 400 metre freestyle, 200 metre freestyle, and 200 metre butterfly events at the 2018 Summer Youth Olympics.
The men's 50 metre freestyle event at the 2020 Summer Olympics was held from 30 July to 1 August 2021 at the Olympic Aquatics Centre. It will be the event's tenth appearance, first held in 1904 and then at every edition since 1988. The event is nicknamed the "splash and dash" event.
Nicolò Martinenghi is an Italian swimmer. He is a two-time world record holder in the 4×50 metre medley relay, swimming breaststroke on both relays. He is the Italian record holder in the 50 metre breaststroke and 100 metre breaststroke.
Benedetta Pilato is an Italian swimmer. She is the world record holder in the long course 50 metre breaststroke. She is the European champion in the 50 metre breaststroke in 2021 and the 100 metre breaststroke in 2022 as well as the silver medalist in the 50 metre breaststroke in 2022. In 2021, she won a silver medal in the 50 metre breaststroke at the 2021 World Short Course Championships. She is the world champion in the 100 metre breaststroke and the silver medal in the 50 metre breaststroke at the 2022 World Aquatics Championships.
The women's 100 metre freestyle event at the 2001 World Aquatics Championships took place 25 July. The heats and semifinals were held on 24 July.
Pieter Coetze is a South African swimmer. He is the African record holder in the long course and short course 100 metre backstroke and short course 50 metre backstroke. At the 2022 Commonwealth Games, he won the gold medal in the 100 metre backstroke, the silver medal in the 50 metre backstroke, and the bronze medal in the 200 metre backstroke. At the 2022 World Junior Championships, he competed in ten events, including winning the gold medal in the 200 metre backstroke, silver medals in the 50 metre backstroke, 100 metre backstroke, and the 4×100 metre medley relay, as well as a bronze medal in the 4×100 metre mixed medley relay.
Michele Lamberti is a competitive Italian swimmer. He is a former world record holder in the short course 4×50-metre medley relay. He currently holds the Italian record in the short course 50-metre backstroke. At the 2021 European Short Course Championships he won a gold medal and set a world record in the 4×50-metre medley relay, won three silver medals, one in the 50-metre backstroke, one in the 100-metre butterfly, and one in the 4×50-metre mixed medley relay, and won a bronze medal in the 200-metre backstroke. At the 2021 World Short Course Championships he won two bronze medals in relay events, swimming in the preliminaries for each relay.
Vladislav Gerasimenko is a Russian competitive swimmer. He is a world junior record holder in the long course 4×100 metre medley relay, swimming a 59.53 for the breaststroke portion of the relay. He is a four-time medalist at the 2018 Summer Youth Olympics and a five-time medalist at the World Junior Swimming Championships, spanning breaststroke and freestyle disciplines. He competed at the 2021 European Short Course Swimming Championships, placing sixteenth in the preliminaries of the 50 metre breaststroke.
Kirill Strelnikov is a Russian competitive swimmer. He won a gold medal in the 4×50 metre medley relay at the 2021 World Short Course Championships and the 4×100 metre medley relay at the 2013 World University Games, swimming the breaststroke leg of both relays in the final. At the 2021 European Short Course Championships he won a bronze medal in the 4×50 metre mixed medley relay, swimming the breaststroke leg of the relay in the preliminaries.
