Ariarne Titmus will have her first genuine shot at reclaiming the 400m freestyle world record when she headlines the start of the swimming world championships trials in Melbourne.
Olympic champion Titmus set a world record of 3:56.40 on May 22 last year at the nationals in Adelaide.
She skipped last year's world championships to focus on the Commonwealth Games, where she saw off Canadian teenager Summer McIntosh.
But 16-year-old sensation McIntosh since took the world record from Titmus by clocking 3:56.08 at Canada's world championships trials in March.
Titmus has previously described losing the record as a "tough pill to swallow" but said it had "lit a fire in the belly".
She will have the chance to prove it on Tuesday night at Melbourne Sports and Aquatic Centre (MSAC).
"I don't know specifically if she's hungry," Swimming Australia head coach Rohan Taylor told reporters.
"But I would imagine that her competitive nature, with what's going on with Summer McIntosh and even Katie Ledecky, Arnie (Titmus) has always been a competitive athlete.
"And I'm sure if I did sit down with her and talk to her about it, I would find out she's pretty motivated."
If Titmus was rattled by losing her record, it certainly hasn't come across.
"I haven't noticed anything. She's just an amazing trainer," Taylor said.
"Her commitment is significant, so she doesn't look any different to me."
Titmus went into the nationals on the Gold Coast in April after being ill, not tapered, and clocked 4:00.49.
Tuesday night will be the first time she swims tapered since losing the world mark.
When asked whether Titmus still had another level to go to, Taylor replied: "I think so. Absolutely, 100 per cent.
"With Dean (Boxall), her coach, with all his athletes he just has a plan for all of them.
"They're involved in that, they talk about it, they train for it."
The top two from each event at the trials will qualify for next month's world championships in Japan, provided they swim inside a FINA A qualifying time.
There is also selectors' discretion while some swimmers could qualify for relays alone.
The tight criteria means Tuesday's men's 400m freestyle also shapes as a show-stopper.
Reigning world champion Elijah Winnington, Sam Short, and veteran Mack Horton are all in the mix.
"That's a good one," Taylor said.
"They're training extremely well, all of them, the boys I've seen.
"You've got the second, third and fourth fastest 400m freestylers in Australia all-time, which is a rich event for us in the world as we know, racing for two spots.
"It's going to be brutal."
Zac Stubblety-Cook (100m breaststroke), Kaylee McKeown (200m individual medley) and Emma McKeon (100m butterfly) will also be in action.
