Australia's Titmus smashes Ledecky's 400m freestyle world record
Ariarne Titmus smashed Katie Ledecky's 400m freestyle world record at the Australian championships Sunday, touching in 3mins 56.40secs. The 21-year-old upset Ledecky in the Tokyo Olympic pool last year to claim gold and has now shattered the American great's world best of 3:56.46 set at the 2016 Olympics in Rio.


