Leading Olympic medal prospects Melissa Wu and Brittany Broben face one final hurdle before Rio at the Games diving trials in Melbourne starting on Thursday.
With two Olympic silver medals between them, the 10m platform specialists are expected to lead the Australian charge in Rio following the retirement of gold medallist Matthew Mitcham earlier this year.
But, despite impressive results around the world this year, Wu and Broben still must finish top two in the trials to secure their Rio spots.
Their biggest challenge may come from young Queenslander Emily Meaney, however West Australian Teju Williamson and South Australian Taneka Kovchenko could also cause an upset.
Wu, 24, is gunning for her third Olympics after winning silver in 2008 in the synchronised 10m platform with Briony Cole.
Ten years ago Wu burst on to the scene as a tiny 13-year-old at the Melbourne Commonwealth Games.
With so much experience under her belt, Wu is taking this week's trials in her stride.
She has been in fine form, winning bronze in the World Cup in Brazil as well as two bronzes in World Series events.
"I don't worry too much about the other divers and try to focus on myself and that works best for me," said Wu.
"I'm feeling pretty good training-wise and prep-wise and I've had a lot of competitions this year."
Broben was also just 16 at her first Olympics Games, stunning the diving world to win silver in the individual 10m at London.
She finished her preparation for the trials with ice on her shoulder, which still gives her trouble following surgery in 2014.
"It's only been two years since surgery and I came back pretty quickly to the sport so I still have little issues with it," Broben said.
Despite her Olympic success, the Queenslander said she felt under more pressure heading into these selection trials than before London.
"People say it must be easy because you've done it before but I feel like this time it's harder because going into London I had no idea what to expect," Broben said.
"Now I know what's coming. I know how hard it is to make the team and what it takes and that puts more pressure on me."
There are 10 Olympic spots up for grabs - two divers each in the women's and men's 10m platform, two each in the 3m springboard, and one pair in the women's 3m synchro.
Other divers to watch include 3m synchro world championship bronze medallists Samantha Mills and Esther Qin, Maddison Keeney in the women's 3m and James Connor in the men's 3m.