Day 1 Prelims Summary
Women's 200m Individual Medley (advancing to semi-finals):
Douglass, McKeown, Harvey, Walsh, Yu, Forrester, Ye, Franceschi, Ohashi, Gorbenko, Meder, Shanahan, Steenbergen, Kim, Narita, Walshe
Men's 400m Freestyle (advancing to finals):
Short, Auboeck, Costa, Hafnaoui, Martens, Kim, Winnington, Djakovic
Women's 100m Butterfly (advancing to semi-finals):
Zhang, McKeon, Kohler, Hansson, MacNeil, Huske, Wang, Walsh, Throssell, Pudar, Wattel, Ntountounaki, Soma, Kajtaz, Bach, Savard
Men's 50m Butterfly (advancing to semi-finals):
Grousset, Peters, Carter, Sameh, Ponti, Ceccon, Ribeiro, Korstanje, Kharun, Proud, Rose, Szabo, Bucher, Molla, Liendo, Miladinov
Women's 400m Freestyle (advancing to finals):
Ledecky, Titmus, McIntosh, Gose, Fairweather, Pallister, Sims, Li
Men's 100m Breaststroke (advancing to semi-finals):
Qin, Kamminga, Matzerath, Martinenghi, Fink, Matheny, Poggio, Wilby, Yan, Sidlauskas, Petrashov, Choi, Ogretir, Gomes Jr., Reitshammer, Stubblety-Cook
Men's 400m Individual Medley (advancing to finals):
Foster, Marchand, Seto, Razzetti, Smith, Kalisz, Hollo, Clareburt
Women's 4x100m Freestyle Relay (advancing to finals):
Australia, United States, Netherlands, Great Britain, China, Sweden, Canada, Japan
Men's 4x100m Freestyle Relay (advancing to finals):
United States, Australia, Italy, Canada, China, Spain, Brazil, Israel