The men's 50 metre breaststroke competition of the swimming events at the 2011 World Aquatics Championships was held on July 26 with the heats and the semifinals and July 27 with the final.
The women's 100 metre butterfly event in swimming at the 2013 World Aquatics Championships took place on 28–29 July at the Palau Sant Jordi in Barcelona, Spain.
The Men's 100 metre butterfly competition of the 2014 European Aquatics Championships was held on 22–23 August.
The Women's 50 metre breaststroke competition of the 2014 European Aquatics Championships was held on 23–24 August.
The Women's 100 metre breaststroke competition of the 2014 FINA World Swimming Championships was held on 5 December with the heats and the semifinals and 6 December with the final.
The Women's 100 metre butterfly competition of the swimming events at the 2015 World Aquatics Championships was held on 2 August with the heats and the semifinals and 3 August with the final.
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.
The Women's 100 metre freestyle competition at the 2017 World Championships was held on 27 and 28 July 2017.
Regan Smith is an American competitive swimmer. She is the current long course world record holder in the women's 200-meter backstroke and a former world record holder in the 100-meter backstroke. Smith competed at the 2020 Summer Olympics in three events representing the United States, winning a bronze medal in the 100-meter backstroke, a silver medal in the 200-meter butterfly, and a silver medal in the 4×100-meter medley relay.
The men's 50 metre freestyle competition of the 2018 FINA World Swimming Championships was held on 13 and 14 December 2018.
The Men's 50 metre freestyle competition at the 2019 World Championships was held on 26 and 27 July 2019. Caeleb Dressel finished first in the final, retaining the title he won in the previous Championships.
The Men's 100 metre backstroke competition at the 2019 World Championships was held on 22 and 23 July 2019. The defending champion was Xu Jiayu, and he successfully defended his title. Jiayu set a competition record in the semifinals by winning his semifinal in 52.17 seconds.
The Men's 50 metre breaststroke competition at the 2019 World Championships was held on 23 and 24 July 2019.
The Men's 100 metre breaststroke competition at the 2019 World Championships was held on 21 and 22 July 2019. Adam Peaty broke the world record with a time of 56.88 in the semi-final, the first man to swim under 57 seconds in this event, and went on to win in the final.
The Men's 100 metre butterfly competition at the 2019 World Championships was held on 26 and 27 July 2019. The defending champion Caeleb Dressel broke Michael Phelps' ten-year-old record by 0.32 second in the semi-final, setting a new world-record time of 49.50 seconds. Dressel won the final held the following day, defending his title.
The Men's 200 metre butterfly competition at the 2019 World Championships was held on 23 and 24 July 2019. The event was won by Kristóf Milák, who broke a 10-year-old record set by Michael Phelps, and set a new world-record time of 1:50.73 in the process.
The Women's 100 metre breaststroke competition at the 2019 World Championships was held on 22 and 23 July 2019.
The Women's 50 metre butterfly competition at the 2019 World Championships was held on 26 and 27 July 2019.
The Women's 100 metre butterfly competition at the 2019 World Championships was held on 21 and 22 July 2019.
The Women's 50 metre backstroke competition of the 2020 European Aquatics Championships will be held on 18 and 19 May 2021.
