Ryan Steven Lochte is an American professional swimmer and 12-time Olympic medalist. Along with Natalie Coughlin, Dara Torres, and Jenny Thompson, he is the second-most decorated swimmer in Olympic history measured by total number of medals, behind only Michael Phelps. Lochte's seven individual Olympic medals rank second in history in men's swimming, tied for second among all Olympic swimmers. He currently holds the world records in the 200-meter individual medley. As part of the American teams, he also holds the world record in the 4×200-meter freestyle and 4×100-meter freestyle (mixed) relay.
Michael Fred Phelps II is an American former competitive swimmer. He is the most successful and most decorated Olympian of all time with a total of 28 medals. Phelps also holds the all-time records for Olympic gold medals (23), Olympic gold medals in individual events (13), and Olympic medals in individual events (16). When Phelps won eight gold medals at the 2008 Beijing Games, he broke fellow American swimmer Mark Spitz's 1972 record of seven first-place finishes at any single Olympic Games. At the 2004 Summer Olympics in Athens, Phelps already tied the record of eight medals of any color at a single Games by winning six gold and two bronze medals. At the 2012 Summer Olympics in London, Phelps won four gold and two silver medals, and at the 2016 Summer Olympics in Rio de Janeiro, he won five gold medals and one silver. This made him the most successful athlete of the Games for the fourth Olympics in a row.
Swimming is an individual or team racing sport that requires the use of one's entire body to move through water. The sport takes place in pools or open water. Competitive swimming is one of the most popular Olympic sports, with varied distance events in butterfly, backstroke, breaststroke, freestyle, and individual medley. In addition to these individual events, four swimmers can take part in either a freestyle or medley relay. A medley relay consists of four swimmers who will each swim a different stroke, ordered as backstroke, breaststroke, butterfly and freestyle.
Daiya Seto is a Japanese professional swimmer who specializes in individual medley, butterfly, breaststroke, and freestyle events. He won the gold medal in the 400-metre individual medley at the 2012, 2014, 2016, 2018, and 2021 world short course championships, as well as at the 2013, 2015, and 2019 world long course championships. Seto holds the world records in the short course 200-metre butterfly and the 400-metre individual medley.
The men's 100 metre breaststroke competition of the swimming events at the 1973 World Aquatics Championships took place on September 4.
The men's 100 metre backstroke competition of the swimming events at the 1973 World Aquatics Championships took place on September 4.
The men's 4 × 100 metre freestyle relay competition of the swimming events at the 1973 World Aquatics Championships took place on September 5.
The women's 400 metre individual medley competition of the swimming events at the 1973 World Aquatics Championships took place on September 6.
The men's 400 metre freestyle competition of the swimming events at the 1973 World Aquatics Championships took place on September 6.
The men's 200 metre backstroke competition of the swimming events at the 1973 World Aquatics Championships took place on September 6.
The men's 200 metre breaststroke competition of the swimming events at the 1973 World Aquatics Championships took place on September 6.
The men's 200 metre butterfly competition of the swimming events at the 1973 World Aquatics Championships took place on September 6.
The women's 400 metre freestyle competition of the swimming events at the 1973 World Aquatics Championships took place on September 7.
The men's 200 metre individual medley competition of the swimming events at the 1973 World Aquatics Championships took place on September 7.
The men's 4 × 200 metre freestyle relay competition of the swimming events at the 1973 World Aquatics Championships took place on September 7.
The men's 100 metre butterfly competition of the swimming events at the 1973 World Aquatics Championships took place on September 8.
The men's 1500 metre freestyle competition of the swimming events at the 1973 World Aquatics Championships took place on September 8.
The men's 100 metre freestyle competition of the swimming events at the 1973 World Aquatics Championships took place on September 9.
Chase Tyler Kalisz is an American swimmer who specializes in individual medley events. He is an Olympic gold medalist in the 400-meter individual medley at the 2020 Summer Olympics in Tokyo, an Olympic silver medalist at the 2016 Summer Olympics in Rio de Janeiro and a two-time World Aquatics Championships gold medalist.
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.
