Day 1 Finals Summary (I'll update since @Topicmaster1010 forgot)
Men's 400m Freestyle Final
1. Sam Short (3:40.68), 2. Ahmed Hafnaoui (3:40.70), 3. Lukas Martens (3:42.20), 4. Guilherme Costa (3:43.58), 5. Woomin Kim (3:43.58), 6. Antonio Djakovic (3:44.22), 7. Elijah Winnington (3:44.26), 8. Felix Auboeck (3:44.33)
Women's 100m Butterfly (Through to Finals)
Zhang Yufei → Torri Huske → Maggie MacNeil → Emma McKeon → Angelina Kohler → Gretchen Walsh → Brianna Throssel → Marie Wattel
Men's 50m Butterfly (Through to Finals)
Maxime Grousset → Dare Rose → Jacob Peters → Thomas Ceccon → Abdelrahman El-Araby → Ben Proud → Diogo Ribeiro → Simon Bucher
Women's 400m Freestyle Final
1. Ariarne Titmus (3:55.38/WR), 2. Katie Ledecky (3:58.73), 3. Erika Fairweather (3:59.59), 4. Summer McIntosh (3:59.94), 5. Li Bingje (4:01.65), 6. Lani Pallister (4:05.17), 7. Isabel Gose (4:05.27), 8. Bella Sims (4:05.37)
Men's 100m Breastroke (Through to Finals)
Qin Haiyang → Lucas Matzerath → Nic Fink → Yan Zibei → Arno Kamminga → Josh Matheny → Nicolo Martinenghi → Berkay Ogretir
Women's 200m Individual Medley (Through to Finals)
Alex Walsh → Yu Yiting → Marrit Steenbergen → Jenna Forrester → Yui Ohashi → Kate Douglass → Ye Shiwen → Anastasia Gorbenko
Men's 400m Individual Medley Final
1. Leon Marchand (4:02.50/WR), 2. Carson Foster (4:06.56), 3. Daiya Seto (4:09.41), 4. Chase Kalisz (4:10.23), 5. Brendon Smith (4:10.37), 6. Lewis Clareburt (4:11.29), 7. Alberto Razzetti (4:11.73), 8. Balazs Hollo (4:13.36)
Women's 4x100m Freestyle Relay Final
1. Australia (3:27.96/WR), 2. United States (3:31.93), 3. China (3:33.40), 4. Great Britain (3:33.90), 5. Sweden (3:34.17), 6. Netherlands (3:35.41), 7. Canada (3:36.62), 8. Japan (3:38.61)
Men's 4x100m Freestyle Relay Final
1. Australia (3:10.16), 2. Italy (3:10.49), 3. United States (3:10.81), 4. China (3:11.38), 5. Canada (3:12.05), 6. Brazil (3:12.71), 7. Israel (3:14.53), 8. Spain (3:14.64)