![American legend Katie Ledecky and Australia's Ariarne Titmus at last year's world championships. Photo: AP PHOTO American legend Katie Ledecky and Australia's Ariarne Titmus at last year's world championships. Photo: AP PHOTO](/images/transform/v1/crop/frm/silverstone-feed-data/6fef00c7-5588-4ab1-aa67-4001ab646eba.jpg/r0_0_800_600_w1200_h678_fmax.jpg)
THE WOMEN'S 400m FREESTYLE TALE OF THE TAPE:
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* ARIARNE TITMUS (AUSTRALIA)
Age: 23. Born: Tasmania.
Olympic medals: Two gold, one silver, one bronze
World championship medals: Four gold, two silver, three bronze
Current world records: 200m freestyle, 400m freestyle
* KATIE LEDECKY (USA)
Age: 27. Born: Washington
Olympic medals: Seven gold, three silver
World championship medals: 21 gold, five silver
Current world records: 800m freestyle
* SUMMER McINTOSH (CANADA)
Age: 17. Born: Toronto
Olympic medals: Nil
World championship medals: Four gold, one silver, three bronze
Current world records: 400m individual medley
Australian Associated Press