AUSSIES TO WATCH

Cameron McEvoy

After a poor Rio Games, the “Professor” is back as the No.1-ranked 100m freestyler in the world. Snatched his fourth national title from Olympic champion Kyle Chalmers in April, but the Queenslander is still searching for a first world title.

Emily Seebohm

Having claimed her 21st Australian title in April, the veteran backstroker and medley swimmer will represent Australia at her sixth world championship. The Queenslander won three gold – including two individual – in Kazan two years ago.

Mack Horton

The 400m freestyle champion from Rio is fresh from claiming a rare treble at the nationals, winning the 200m, 400m and 1500m freestyle – matching Grant Hackett’s effort from 2008. The Victorian’s best result at the worlds is 800m bronze in 2015.

Ariarne Titmus

Keep an eye out for the 16year-old from Tasmania, who collected the 400m and 800m freestyle crowns at the nationals, and finished runnerup behind Emma McKeon in the 200m, earning herself three individual swims in Budapest.

Bronte Campbell

The younger Campbell sister finally has her first national titles – the 50m and 100m freestyle, which are usually dominated by sister Cate. But the Queenslander is the reigning 50m and 100m freestyle world champion from Kazan. Cate is taking some time out.

Mitch Larkin

Another who missed out on the ultimate success at the Rio Olympics, forced to settle with a silver medal and a fourth-placing, the Queenslander will look to defend his two world championship titles from Kazan in the 100m and 200m backstroke events.