19-year-old American Claire Curzan is now the second woman to sweep the three backstroke events at LC Worlds, one edition after Aussie Kaylee Mckeown's sweep.
The women's breaststroke events will be among the deepest at the Doha World Championships, with Ruta Meilutyte and Kate Douglass highlighting the fields.
Kate Douglass clocked an American record of 2min 19.30sec to win the women s 200m breaststroke on Saturday as the Pro Swim series meeting in Knoxville, Tennessee, concluded.