The men's 100 metre butterfly event at the 2009 World Aquatics Championships took place between 31 July – 1 August at the Foro Italico. Both the heats and semifinals were held on 31 July with the heats being held in the morning session and the semifinals being held in the evening session. The final was held on 1 August.
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 have been 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.
Anton Mikhailovich Chupkov is a Russian competitive swimmer. He is the holder of the world record in the long course 200 metre breaststroke and the Russian record in the long course 100 metre breaststroke. At the 2015 European Games he won four gold medals in individual and relay events. He won the bronze medal in the 200 metre breaststroke at the 2016 Summer Olympics. He won the gold medal in the 200 metre breaststroke at the 2017 and 2019 World Aquatics Championships.
Michael Charles Andrew is an American competitive swimmer and an Olympic gold medalist. He was the 2016 world champion in the 100 meter individual medley. At his first Olympic Games, the 2020 Summer Olympics, he won a gold medal and set a world record as part of the 4x100 meter medley relay, placed fourth in the 100 meter breaststroke, fourth in the 50 meter freestyle, and fifth in the 200 meter individual medley. Andrew's swims in 2021 at the 2020 Olympics made him the first swimmer to represent the United States at an Olympic Games in an individual breaststroke event as well as another individual event other than an individual medley in the then-125-year-history of swimming at the Summer Olympics.
The Women's 100 metres freestyle event at the 2002 Commonwealth Games took place 31 July-1 August. The heats and the semi were held on 31 July, the final on 1 August.
The Men's 50 metre breaststroke event at the 2002 Commonwealth Games took place between 2 August 2002 and 3 August 2002 at Manchester Aquatics Centre.
The Men's 200 metre breaststroke event at the 2002 Commonwealth Games took place on 4 August 2002 at Manchester Aquatics Centre.
The Men's 100 metre backstroke event at the 2002 Commonwealth Games took place between 2 August 2002 and 3 August 2002 at Manchester Aquatics Centre.
