Katie Ledecky Leon Marchand Adam Peaty Gretchen Walsh Luana Alonso Léon Marchand Ariarne Titmus Ryan Murphy Summer McIntosh 400-Meter Freestyle 100m Breaststroke Lilly King Female Swimmers Cameron McEvoy 400-meter Individual Medley Women's 800m Freestyle Relay Events Men's 800m Freestyle Women's 100-Meter Freestyle Disqualification Rules 400-meter Freestyle Emma McKeon Mollie O'Callaghan Men's 200m Breaststroke Gretchen and Alex Walsh Regan Smith Competition Results Men's 1500m Freestyle Medal Achievements Backstroke 400m Freestyle Sarah Sjöström 4x200 Metres Freestyle Relay Siobhan Haughey Men's 800-Meter Freestyle Men's 200m Freestyle Kaylee McKeown Athlete Achievements Women's 50m Freestyle Relay Races Canadian Swimmers 100-Meter Backstroke Daniel Wiffen 800 Metres Freestyle Team USA Women's Swimming Historical Context Men's 50-Meter Freestyle Swimming Regulations Future Events Sarah Sjostrom Team USA 100m Backstroke Duncan Scott Rivalries Thomas Ceccon Ben Proud 800m Freestyle 100-Meter Breaststroke Women's 400m Individual Medley Training and Preparation Nic Fink 1,500-meter Freestyle Individual Performances Tom Dean Michael Phelps Australian Athletes 100 Metres Backstroke Caeleb Dressel International Competition Women's Freestyle 200-Meter Breaststroke Matt Richards Florent Manaudou Performance Analysis 100-Meter Freestyle Team GB Performance Men's 200m Butterfly Competitions Men's 1,500-Meter Freestyle Kyle Chalmers Athlete Interactions Individual Athletes Emotional Reactions