Federica Pellegrini split 52.53 as the Italian women broke their National Record in the 400 medley relay to place fourth in 3:56.50.
Duncan Scott produced the second-fastest 100 free split in history to help the British men win gold and set a new European Record in the 400 medley relay.
Maggie MacNeil had the fastest butterfly split in the field (55.56) as Canada set a new National Record in the women’s 400 medley relay.
Henrik Christiansen slashed four seconds off his Norwegian National Record in the men’s 1500 final, placing fifth in a time of 14:45.35.
Lewis Clareburt snags the 400m IM bronze in a new Kiwi National Record, with the teen now having dropped 6 seconds in this event in just a year.
Frenchman David Aubry set a new National Record for France by four seconds in the men’s 1500 free final, placing fourth in a time of 14:44.72.
Arjan Knipping set a new Dutch National Record in the men’s 400 IM prelims, qualifying second overall for the final in a time of 4:13.46
Without butterfly, Michael Phelps’ last remaining World Record is the 400 IM, set at the 2008 Beijing Olympics in 4:03.84.
Caeleb Dressel swam the fourth-fastest time in the history of the men’s 50 freestyle in the final, winning gold in an American Record of 21.04
Simona Quadarella became the fourth-fastest swimmer in the history of the women’s 800 freestyle in the World Championship final, clocking 8:14.99.
Simone Manuel anchored in 52.00 as the United States set a new world record in the mixed 400 free relay, defending their World title from 2017.
The Bluefish Swim Club has broken their 3rd National Age Group Record in a mixed-gender relay in the last 2 weeks.
The 19-year old Norgaard is the youngest swimmer in the final of the men’s 1500 by more than two-and-a-half years.
Gabriele Detti had a quick 1:45.30 split as the Italian men set a new National Record in the final of the men’s 4×200 free relay.
American sprint star Caeleb Dressel broke his first individual long course World Record in the 100 butterfly, with a time of 49.50.