The men's 50-metre freestyle event was the 28th event contested of the swimming events at the 2007 World Aquatics Championships at the Rod Laver Arena, Melbourne, Australia. The heats were held in the morning session of the meet on 30 March 2007, with the semi-finals in the evening session of the same day. The final was held on the evening of 31 March 2007.
The men's 800 metre freestyle was the 17th event of the swimming program at the 2007 World Aquatics Championships held in Rod Laver Arena in Melbourne, Australia. The event was swum on the morning of 27 March (heats) and in the evening of 28 March. 46 swimmers were entered in the event, of which 43 swam in one of 6 preliminary heats. The top-8 finishers from the prelims qualified ("Q") to swim in the final the next evening.
The World Aquatics Junior Swimming Championships is an international swimming championship event organized biennially by World Aquatics for girls and boys who are aged 14–18 on 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 girls who were aged 14–17 and boys who were aged 15–18 on the 31st of December of the year of the competition.
Mireia Belmonte García is a Spanish Olympic, world, and European champion swimmer. She is the world record holder in the short course 200 metre butterfly and 400 metre individual medley. Formerly, she held the world record in the short course 400 metre freestyle, 800 metre freestyle, and 1500 metre freestyle. She was the first Spanish woman to win a gold medal in swimming at an Olympic Games and is widely considered to be the greatest Spanish swimmer of all time.
Sarah Fredrika Sjöström is a Swedish competitive swimmer specialising in the sprint freestyle and butterfly events.
The men's 400 metre freestyle at the 2005 World Aquatics Championships took place on 24 July in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 57 swimmers were entered and in the event in the preliminary heats, the top-8 of which advanced on to swim again in the final heat that event.
James Magnussen is a retired Australian swimmer and Olympic medallist. He was the 2011 and 2013 100-metre freestyle world champion, and holds the record for the fifth fastest swim in history in the 100-metre freestyle, with a time of 47.10, which until 2016 also stood as the fastest swim in textile swimwear material.
The swimming portion of the 2011 FINA World Championships was held July 24–31 at the Shanghai Oriental Sports Center in Shanghai, China. Swimming is one of five aquatic disciplines at the championships.
Vladimir Viktorovich Morozov is a Russian competitive swimmer and Olympic medalist. He is the former world record holder in the short course 100-metre individual medley, the current textile world record, World Cup record and Russian national record holder in the 100-metre individual medley and 100-metre freestyle, and Russian record holder in the 50-metre freestyle. He also holds the European record for the 100-metre individual medley. Formerly he held the Russian national record in the 50-metre backstroke and the 50-metre butterfly, and held the European and Russian records in the 50-metre breaststroke.
The men's 400 metre freestyle competition of the swimming events at the 1973 World Aquatics Championships took place on September 6.
The swimming events of the 15th FINA World Aquatics Championships were held July 28 – August 4, 2013, in Barcelona, Spain. The competition was held in a long course pool inside the Palau Sant Jordi. It featured 40 LCM events, split evenly between males and females. Swimming was one of the five aquatic disciplines at the championships.
Mackenzie James Horton is an Australian freestyle swimmer. He is an Olympic gold medallist, World Championships medallist, and Commonwealth Games medallist. At the 2016 Olympic Games in Rio de Janeiro, Brazil, he finished first in the 400m freestyle, winning his first gold medal and became the first male swimmer from the state of Victoria to do so in the Games' history.
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.
Guilherme Pereira da Costa is a Brazilian swimmer. He is the 400m freestyle bronze medalist at the 2022 World Championships. In the 1500 metre freestyle, he is the gold medalist at the 2019 Pan American Games. He is also currently the South American record holder in the 400, 800, and 1500 metre freestyle.
Thomas William Darnton Dean is a British competitive freestyle swimmer. He is a double Olympic gold medalist, winning gold individually in 200 metre freestyle and as part of a team in 4 × 200 m freestyle relay at the 2020 Summer Olympics.
Fernando Muhlenberg Scheffer is a Brazilian swimmer. In the 200 metre freestyle, he is the bronze medalist of the Tokyo 2020 Olympics, the gold medalist at the 2019 Pan American Games and the South American record holder in the event. He became the world champion and world record holder in the 4x200m freestyle relay at the 2018 World Swimming Championships in short course.
Leonardo Coelho Santos is a Brazilian swimmer.
David Popovici is a Romanian competitive swimmer who specializes in freestyle events. He is the current holder of the world record in the long course 100-metre freestyle and the junior world record in the long course 200-metre freestyle. He also holds the junior world record in the short course 100-metre freestyle. At the 2022 World Aquatics Championships, Popovici won gold medals in his two signature events, becoming the first swimmer to do so at the same edition of the World Championships, since Jim Montgomery in 1973. Following his performances during the 2022 long course season, in which he won eleven gold medals and two silver medals, Popovici was voted Male Swimmer of the Year by both SwimSwam and Swimming World Magazine. During that summer, he established an unprecedented level of dominance, especially in the long course 100-metre freestyle, recording 13 of the 19-fastest swims in the world in 2022, while also becoming only the third swimmer in history to set an under 1:43 time in the long course 200-metre freestyle.
Ahmed Ayoub Hafnaoui is a Tunisian swimmer. He is the African record holder in the long course 400-metre and 1500-metre freestyle, and the short course 800-metre and 1500-metre freestyle events. He competed in the 2020 Summer Olympics, where he won a gold medal in the men's 400-metre freestyle. He ranked No. 16 in the world and was the slowest qualifier for the final race but won Olympic gold with a time of 3:43.36. Hafnaoui was the only Tunisian to win Olympic gold at Tokyo 2020.
