Ash Barty's coach Craig Tyzzer says the world number one still has room for improvement ahead of her appearance in the Australian Open semifinals.
Barty has encountered little trouble in advancing to the last four at Melbourne Park for the second time in her career.
She is yet to lose a set and has only had her serve broken once in her five matches at the tournament.
The two-time major champion moved through to the semifinals via a 6-2, 6-0 victory over American 21st seed Jessica Pegula.
Tyzzer said he was satisfied with Barty's form, but believed his charge could play better as they prepare to face former top-10 player Madison Keys in the semifinals on Thursday.
"I don't feel like she's played her best tennis here yet, which is great in that sense," Tyzzer said.
"Obviously, Maddie is going to be a huge challenge. Such a powerful athlete and powerful game. Ash has got to be really switched on to be in a contest out there."
Following a 2021 season that included winning the Wimbledon championship, Tyzzer said Barty felt she did not always hit peak form last year.
"We talked about her best matches," he said.
"Ash said there was probably four times where she felt like she played her best tennis. That was seven-and-a-half months of tennis.
"I think it's her ability to — on the days when she's not playing well — still look like she's playing well and still be able to compete.
"Whether or not she brings her margins in or corrects something or tries something different, she's more capable of handling those days when it's not that good.
"I don't think from the outside you can tell. It's probably the same with most of the top players. Their consistency level is huge.
"Even if you watch them, you can't tell a lot of difference."
Barty only focused on next match
It has been 44 years since a local won the Australian Open women's singles championship, a drought stretching back to Chris O'Neil's victory in 1978.
Barty has come the closest to breaking through in recent times, with a semifinal appearance in 2020 her best showing.
Snapping the drought, however, is a topic her "team" does not discuss, accordingly to Tyzzer.
He said Barty's approach was always to focus only on her next match.
"We don't talk about that at all," Tyzzer said.
"We do the same preparation for every match. We don't want to bring anything new in or make it more than what it actually is.
"It's really just what she needs to do in the next match, is as far as we look, because you basically could be out in your next match."
