The men's 50 metre butterfly at the 2007 World Aquatics Championships took place on 25 March and on the evening of 26 March (final) at Rod Laver Arena in Melbourne, Australia. 160 swimmers were entered in the event, of which 152 swam.
The men's 50 metre backstroke at the 2007 World Aquatics Championships took place on 31 March and on the evening of 1 April (final) at Rod Laver Arena in Melbourne, Australia. 107 swimmers were entered in the event, of which 98 swam.
This article includes the world record progression for the 4×200 metres freestyle relay, and it shows the chronological history of world record times in that competitive swimming event. The 4×200 metres freestyle relay is a relay event in which each of four swimmers on a team swims a 200-metre freestyle leg in sequence. The world records are recognized by and maintained by FINA, the international competitive swimming and aquatics federation that oversees the sport in international competition.
The men's 1500 metre freestyle at the 2007 World Aquatics Championships was held on the morning of 31 March (heats) and the evening of 1 April (final) at Rod Laver Arena in Melbourne, Australia. 50 swimmers were entered in the event, of which 47 swam.
The men's 400 metre individual medley (IM) at the 2007 World Aquatics Championships took place on 1 April at the Rod Laver Arena in Melbourne, Australia. As the event was over 400 meters in length, no semifinals were held in it and the top 8 swimmers from the preliminary heats advance directly to the single final heat. 50 swimmers were entered in the event, of which 49 swam.
The men's 100 metre butterfly at the 2007 World Aquatics Championships took place on 30 March and on the evening of 31 March (final) at Rod Laver Arena in Melbourne, Australia. 123 swimmers were entered in the event, of which 118 swam.
The men's 200 metre breaststroke at the 2007 World Aquatics Championships took place on 29 March and on the evening of 30 March (final) at Rod Laver Arena in Melbourne, Australia. 85 swimmers were entered in the event, of which 79 swam.
The men's 1500 metre freestyle at the 2005 World Aquatics Championships occurred on the morning of 30 July (heats) and in the evening of 31 July (final) in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 34 swimmers were entered in the event, of which 33 swam.
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.
The men's 200 freestyle at the 11th FINA World Aquatics Championships swam 25+26 July 2005 in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 95 swimmers were entered in the preliminary heats, which swam in the morning of July 25. The top-16 swimmers from the prelims advanced on to semifinal heats that evening. From the semifinals, the top 8 swimmers advanced onto the next night's final.
The men's 100 metre freestyle at the 2005 World Aquatics Championships occurred on 27 July and in the evening of 28 July (final) in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 131 swimmers were entered in the event, of which 124 swam in one of 17 preliminary heats. The top-16 swimmers from the heats advanced on to semifinals; the top-8 swimmers in the two semifinals heats advanced onto the next night's final.
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.
The Women's 200 Freestyle at the 11th FINA World Aquatics Championships was swum 26 and 27 July 2005 in Montreal, Quebec, Canada. On 26 July, preliminary heats and semifinals occurred, and on 27 July a final heat was swum in the evening. 64 swimmers were entered in the event, of which 62 swam in one of 8 heats. The top-16 swimmers from the preliminary heats advanced on to semifinals; the top-8 swimmers in the two semifinals heats advanced onto the next night's final.
The Men's 4×100 Freestyle Relay event at the 2005 FINA World Aquatics Championships was swum on July 24, 2005 in Montreal, Quebec, Canada. 24 teams swam in preliminary heats in the day's morning session, with the top-8 teams from the prelims advancing to swim again in the final heat in the day's evening session.
The Men's 1500 metre Freestyle event at the 10th FINA World Aquatics Championships swam on July 26–27, 2003 in Barcelona, Spain. Preliminary heats swam in the morning session on July 26, with the top-8 finishers advancing to swim again in the Final during the evening session on July 27.
The Men's 4×200 Freestyle Relay event at the 10th FINA World Aquatics Championships swam on July 23, 2003. Preliminary heats swam in the morning session that day, with the top eight teams advancing to swim again in the Final that evening.
Ryan Held is an American freestyle swimmer who specializes in the sprint events, and is currently sponsored by Arena. He holds the U.S. Open record in the long course 100 meter freestyle and three world records in short course relay events. At the 2016 Summer Olympics he won a gold medal in the 4×100 meter freestyle relay, swimming in both the prelims and the final of the event. In 2021, he won silver medals in the 50 meter freestyle and the 100 meter freestyle at the 2021 World Short Course Championships. At his first FINA World Aquatics Championships, the 2022 World Aquatics Championships, he won a gold medal in the 4×100 meter freestyle relay.
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.
Kieran Smith is an American swimmer specializing in freestyle and individual medley events. He currently co-holds short course world records in the 4×200 meter freestyle relay and the 4×100 meter medley relay. He is the Americas record holder in the long course 400 meter freestyle and the American record holder in the 500 yard freestyle. In the 400 meter freestyle, he won the bronze medal at the 2020 Summer Olympics and the gold medal at the 2022 World Short Course Championships. Following a fourth-place finish in the 4×200 meter freestyle relay at the 2020 Summer Olympics, he won gold medals in the event at the 2021 World Short Course Championships, 2022 World Aquatics Championships, and the 2022 World Short Course Championships.
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.
