American Katie Ledecky shattered her own 800 metres freestyle world record in 8min 4.12secs at the Tyr Pro Series meet in Fort Lauderdale, Florida, finding her best form heading into the world championships.
Ledecky bettered her previous mark of 8:04.79 set nearly a decade ago at the Rio Games that many thought would outlast her career and she pounded her fists on the water in an emotional celebration after seeing her time.
