If Ariarne Titmus is to create history by winning the 200-400-800m Olympic treble, she will have to put in her toughest day at the Tokyo pool on Saturday after Katie Ledecky reasserted herself with a dominant swim in the 800m heats tonight.
Swimmers continue to shine but challenge awaits
![Titmus](/_next/image/?url=https%3A%2F%2Fcontent.olympics.com.au%2Fpublic%2Fstyles%2Flandscape_header_section%2Fs3%2F2021-07%2FGettyImages-1234287836.jpg.webp%3Fitok%3D2LdcBol8&w=1200&q=90)