On Saturday night, the Australian team from Jack Cartwright, Kyle Chalmers, shayna jack, and Mollie O’Callaghan broke their country’s old world record in the 4×100 freestyle relay, combining for a time of 3:18.83. Cartright, Chalmers and O’Callaghan were just the previous world record-breaking relay, who posted a time of 3:19.38.
Although Cartwright played third behind America’s jack alexy and Great Britain matthew richards, Chalmers posted the fastest men’s division of the field to help move the Aussies into second place. Jack and O’Callaghan then recorded the only two under-52 divisions on the women’s side to give their team a clear lead.
In the end, the Australians won by 1.99 seconds.
Split Comparison:
| Australia, 2023 World Championships (current world record) | Australia, 2022 World Championships (old world record) |
| Jack Cartwright – 48.14 | Jack Cartwright – 48.12 |
| Kyle Chalmers – 47.25 | Kyle Chalmers – 46.98 |
| shayna jack – 51.73 | Madi Wilson-52.25 |
| Mollie O’Callaghan – 51.71 | Mollie O’Callaghan – 52.03 |
| 3:18.83 | 3:19.38 |
This relay is Australia’s third world record relay at these World Championships, as they previously broke the women’s 4 × 100 and 4 × 200 freestyle relay world records earlier in the competition.
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