The Brazilian men broke the South American Record in the 400 free relay in both prelims and finals.
Vlad Morozov had the fastest split in the field (45.06) as the Russians broke the European Record in the 400 free relay and won silver in Hangzhou.
Although early in the competition, America tops the medal table at the 2018 FINA Short Course World Championships.
Chad Le Clos lost his world record to Daiya Seto, but did break his African Record in 1:48.32.
Caeleb Dressel led the U.S. off in an American Record and they broke the world record in the 400 free relay.
Wang Shun defended his 200 IM World title in a new Chinese Record of 1:51.01.
Fantine Lesaffre tied the French Record in the 400 IM in Hangzhou.
Brendan Hyland nailed a new Irish National Record en route to 10th place in the men’s 200m fly on day 1 of the 2018 FINA Short Course World Championships.
Martina Carraro broke the Italian Record in the women’s 50 breast in a time of 29.79.
Daiya Seto broke the world record in the men’s 200 fly in a time of 1:48.24.
Mallory Comerford lowered the American 200 free record once again in 1:51.81, winning silver in the final.
Ariarne Titmus became the 4th fastest performer of all-time in the women’s SCM 200 freestyle.
Danas Rapsys became the 3rd fastest performer in history with his 3:34.01 in the men’s 400 freestyle.
Caeleb Dressel will make his SCM debut on the American 400 free relay today in Hangzhou.