O'Callaghan wins 100 metres freestyle, McKeon misses out

MELBOURNE :Mollie O'Callaghan swept to victory in a 100 metres freestyle final stacked with class but Emma McKeon's hopes of defending her gold medal in Paris were crushed at Australia's Olympic trials on Friday.

O'Callaghan won in 52.33 seconds, 0.39 seconds clear of runner-up Shayna Jack, who wept after securing the second individual 100m berth three years after missing Tokyo while banned for doping.

McKeon claimed the 50m and 100m gold in a record haul of seven medals at Tokyo but finished sixth in Friday's final and can be selected only for the relays.

O'Callaghan has had a rollercoaster week, swimming superbly while having her 200m freestyle world record swiped in the final by her champion club mate Ariarne Titmus.

The 20-year-old was disappointed with her 100m swim at the Brisbane Aquatic Centre but glad to top a quality field.

"At the end of the day, trials is just to make it on the team, so I'm pretty stoked with that," she said at the pool-side.

"But you know there's that little extra that you want."

A fixture in Australia's 100m freestyle relay teams since the 2008 Beijing Olympics, Cate Campbell was devastated after failing to qualify for the final.

She has an uphill battle to win a 50m freestyle berth and secure a fifth Games appearance.

Her younger sister Bronte, however, finished fourth in the 100m final to nab a spot on the relay team along with Meg Harris (third) and 18-year-old surprise package, Olivia Wunsch (fifth).

Bronte Campbell struggled to hold back tears as she paid tribute to 32-year-old Cate, who won two relay golds at Tokyo and the individual 100m bronze.

"I felt devastated for my sister this morning," she said.

"But she is absolutely incredible. I mean, she held this individual spot in the 100