Shayna Jack's resilience is being praised as the drug-tainted swimmer seeks a return to the Australian team when racing on Wednesday.
Jack, who has served a two-year doping ban, will contest the 100 metres freestyle on the opening day of the Australian swim championships in Adelaide.
The meet doubles as selection trials for the world championships in June and the Commonwealth Games in July.
Jack already boasts the fastest 100m freestyle in the world this year, 53.13 seconds at the NSW state championships in March.
"Shayna is pretty resilient, I think she has proven that," Australia's head coach Rohan Taylor said.
"Shayna has been very consistent in her training and it's really a credit to her.
"She did her time and really worked on her own through that place and then came back."
Jack was initially banned for four years after testing positive to the banned substance Ligandrol about three weeks before the 2019 world championships.
The Queenslander appealed her ban to the Court of Arbitration for Sport which reduced her suspension to two years, finding Jack did not knowingly ingest the substance.
"(She) has been training really well and has put some good times down," Taylor said.
"Her goal is to get ... back in the Australian team and I am really looking forward to seeing her race here."
With renowned 100m freestylers Cate Campbell, her sister Bronte and Olympic champion Emma McKeon absent from the Adelaide meet, Jack is a frontrunner to earn a recall to the Australian team.
The Campbell sisters are taking a break from swimming while McKeon, who won four gold among her seven medals at last year's Tokyo Olympics, will skip the trials.
McKeon has taken advantage of a new edict from Swimming Australia that grants Olympic medallists automatic selection for the Commonwealth Games.
Jack will race 100m freestyle heats on Wednesday morning ahead of the night-time final of an event which headlines day one of the championships.
Wednesday's other main event is the men's 100m butterfly featuring Kyle Chalmers and pop star turned swimmer Cody Simpson.
Chalmers, an Olympic gold and silver medal winner in the 100m freestyle, will only swim butterfly races in Adelaide.
And Chalmers credits the 'fly as rekindling his motivation after taking time off after last year's Tokyo Olympics - he has only returned to training in the past six weeks.
"It's a bit of fun," Chalmers said of the butterfly.
"I am probably not going to produce anything amazing this week but I think by Commies (Commonwealth Games) hopefully I can get my hand on the wall in the top three."
