Gregorio Paltrinieri is an Italian competitive swimmer. He is a former world record holder in the short course 1500 metre freestyle. He holds the European record in the long course 800 metre and 1500 metre freestyle events with times of 7:39.27 and 14:32.80, respectively. In the 1500 metre freestyle, he is a 2016 Olympic, three-time world long course, two-time world short course, three-time European long course, and three-time European short course champion. In the 800 metre freestyle, he is a 2019 world long course, 2022 world short course, three-time European long course, and 2021 European short course champion. In the 10 kilometre open water swim, he is a 2022 world and 2020 European champion. In the 5 kilometre open water swim, he is a two-time European champion.
Allan Lopes Mamédio do Carmo is a Brazilian swimmer, who specialized in open water marathon. He is considered one of the fastest professional open water swimmers in the world, finishing near the top of FINA World Cup races for the 10 km marathon. He also won a bronze medal for his category at the 2007 Pan American Games in Rio de Janeiro.
Chad Ho is a South African open water swimmer, who specialises in 10 km and 5 km marathon swimming. Educated at Westville Boys' High School, he is considered one of the fastest professional open water swimmers in the world, having won the overall series title at the 2010 FINA World Cup and attended the Olympic Game's twice - 2008 and 2016. He is also currently a seven-time titleholder of the Midmar Mile.
The swimming competitions at the 2020 Summer Olympics in Tokyo were due to take place from 25 July to 6 August 2020 at the Olympic Aquatics Centre. Due to the COVID-19 pandemic, the games were postponed to 2021. However, their official name remained 2020 Summer Olympics with swimming events set for 24 July–1 August 2021 and marathon swimming set for 4–5 August 2021.
The men's marathon swimming at the 2016 Summer Olympics in Rio de Janeiro took place on 16 August at Fort Copacabana, over a distance of 10 kilometres.
The women's marathon swimming over a distance of 10 kilometres at the 2016 Summer Olympics in Rio de Janeiro took place on 15 August at Fort Copacabana.
Kristóf Rasovszky is a Hungarian Olympic swimmer. He represented his country at the 2016 Summer Olympics and 2020 Summer Olympics winning the silver medal in the 10 kilometre open water swim at the 2020 Olympic Games.
Florian Wellbrock is a German swimmer. He is the world record holder in the short course 1500 metre freestyle. He won gold medals in the 10 kilometre open water swim and 1500 metre freestyle at the 2019 World Aquatics Championships. At the 2020 Summer Olympics he won the gold medal in the 10 kilometre open water swim and the bronze medal in the 1500 metre freestyle. In December 2021, he won a gold medal in the 1500 metre freestyle at the 2021 World Short Course Championships.
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 100 metre freestyle event at the 2020 Summer Olympics was held from 27 to 29 July 2021 at the Tokyo Aquatics Centre. There were approximately 60 competitors from approximately 45 nations, with the ultimate numbers determined through the ongoing selection process, including universality places.
The men's 100 metre backstroke event at the 2020 Summer Olympics was held from 25 to 27 July 2021 at the Tokyo Aquatics Centre. It was the event's twenty-sixth appearance, having been held at every edition since 1904 except 1964. Moreover, these Games marked the first time when the men's sprint backstroke event was held in Tokyo, as the event was not included in the swimming program in 1964.
The men's 200 metre individual medley event at the 2020 Summer Olympics was held from 28 to 30 July 2021 at the Tokyo Aquatics Centre. It was the event's twelfth appearance, having been first held in 1968 and 1972 and then at every edition since 1984.
The women's marathon 10 kilometre event at the 2020 Summer Olympics was held on 4 August 2021 at the Odaiba Marine Park. It was the fourth appearance of the event, having first been held in 2008.
Djibouti 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. This was the nation's ninth appearance at the Summer Olympics; Djibouti did not field any athletes at the 2004 Summer Olympics in Athens. The delegation consisted of four athletes, three men and one women, competing in five events across three sports. Two athletes participated in the judo and swimming tournaments: Aden-Alexandre Houssein and Houssein Gaber Ibrahim. Athlete Ayanleh Souleiman, a returning competitor from the 2016 Rio Olympics competed in the men's 800 metres and 1500 metres events. Souhra Ali Mohamed, who had previously participated in the 2012 Summer Olympics competed in the women's 1500 metres event. Houssein lead the Djiboutian squad as the flagbearer in the opening ceremony with Souhra being the flagbearer for the closing ceremony.
Domenico Acerenza is an Italian open water swimmer and pool swimmer. He is the 2022 European Aquatics Championships gold medalist in the 10 kilometre open water swim and the 2022 World Aquatics Championships silver medalist in the 10 kilometre open water swim. At the 2020 Summer Olympics, he placed ninth in the 1500 metre freestyle.
Matan Roditi is an Israeli Olympic marathon swimmer. His 4th place at the 2020 Olympics is the closest Israel has got to an Olympic medal in swimming.
Hector Pardoe is a British swimmer. Specialising in distance and open water events, he is the 2024 bronze medalist in the World Aquatics Championships 10 km open water race, the first British male swimmer to win a world open water swimming medal since Welsh compatriot David Davies.
Sven Schwarz is a German competitive swimmer. He is the world junior record holder in the short course 800 metre freestyle, and the 2023 European under-23 champion over 800 metres. He won a silver medal in the 4×200 metre freestyle relay and bronze medals in the 800 metre and 1500 metre freestyle at the 2019 European Junior Championships. In 2021, he won one bronze medal each in the 800 metre freestyle and 1500 metre freestyle at the 2021 European Short Course Championships. At the 2022 European Aquatics Championships, he placed fifth in the final of the 800 metre freestyle.
Dario Verani is an Italian competitive open water swimmer. At the 2022 World Aquatics Championships, he won the world title and gold medal in the 25 kilometre open water swim. He won the silver medal in the 25 kilometre open water swim at the 2022 European Aquatics Championships and the bronze medal in the 5 kilometre open water swim at the 2020 European Aquatics Championships. He was champion in the 5 kilometre open water swim at the inaugural Mediterranean Beach Games in 2015.
Dávid Betlehem is a Hungarian competitive pool and open water swimmer. At the 2022 World Aquatics Championships, he won a silver medal in the open water 4×1500 metre team relay. At the 2020 European Aquatics Championships, he won a bronze medal in the 5 kilometre open water team relay. At the 2022 World Junior Open Water Championships, he won gold medals in the 10 kilometre open water swim and team relay. He won the silver medal in the 1500 metre freestyle at the 2021 European Junior Swimming Championships.
