Naomi Osaka of Japan serves in her match against Karolina Pliskova of the Czech Republic during the Brisbane International tennis tournament in Brisbane, Australia, Jan 3, 2024. (PHOTO / AP)

Smaller things are getting Naomi Osaka's attention now that she's preparing for her Grand Slam comeback.

She's focusing on being more in the moment. More patient. More conscious of who may be watching her play her first major since 2022, and what kind of impression she'll make.

The first 15-day Australian Open, set to start Sunday morning, has been hyped as the tournament of comebacks. And Osaka has top billing among the three former Australian Open champions — all once ranked No 1 — returning to Melbourne Park for their first time as moms.

The attention on that returning trio — Osaka, Angelique Kerber and Caroline Wozniacki — intensified after another prominent storyline fizzled out when Rafael Nadal's attempted comeback from a yearlong injury layoff lasted just three matches.

Becoming a mom changed my mindset a lot ... I think I'm a lot more open-minded, a lot more patient. Also, I feel a lot stronger physically, but I think (my daughter) Shai definitely helped me with the way I view things.

Naomi Osaka, Japanese professional tennis player

The 22-time major winner has a small tear in a muscle near his surgically repaired hip and flew home, leaving Novak Djokovic as the only remaining member of the so-called "Big Three" in the competition.

Osaka competed for the first time in more than a year last week; she became a mother in July when her daughter, Shai, was born.

The four-time major winner went 1-1 in Brisbane and found herself engaging more with other players, and more eager to acknowledge fans.

"A part of me felt like Shai was watching me," she said. "I wanted to do my best for her. Also, when I was signing autographs, I was more aware of kids. I see them differently now because I'm a mom, too, and I can picture Shai being that age. Yeah, I think while I'm playing, I'm aware of it in the sense that I want to be a good role model for my daughter."

The 26-year-old Osaka has a Japanese mother and a Haitian father. She was born in Japan and grew up in the United States. With endorsements and prize money, she's one of the wealthiest athletes in women's sports.

ALSO READ: New mother Osaka tames nerves for winning return in Brisbane

In the past, she's felt enormous pressure. Osaka was open about her issues with depression and anxiety when she withdrew from the French Open in 2021. She later took extended breaks from the game to protect her mental health.

Germany's Angelique Kerber plays a backhand return to Poland's Iga Swiatek during the final of the United Cup in Sydney, Australia, on Jan 7, 2024. (PHOTO / AP)

She didn't play elite-level tennis at all last year, but realized she really did miss it.

"Becoming a mom changed my mindset a lot," she said. "I think I'm a lot more open-minded, a lot more patient. Also, I feel a lot stronger physically, but I think Shai definitely helped me with the way I view things."

Osaka won her second US Open title in 2020 and her second Australian Open title in 2021. Not long after, she said, "I closed myself off a lot."

"I don't think that was quite fair. When people give me positivity and joy, I feel like it's fair to return it."

Angelique Kerber, who had her Grand Slam breakthrough in Australia in 2016, withdrew from the 2022 US Open because she was pregnant. Her daughter, Liana, was born in February; Kerber's first competitive win since then came last week in Sydney, as a member of Germany's victorious United Cup team

In Brisbane, Osaka didn't wear headphones around the tennis venue, a choice she described as "character development".

"I feel like I'm more confident with who I am as a person," she said. "Now I find myself interacting with people."

Kerber, who had her Grand Slam breakthrough in Australia in 2016, withdrew from the 2022 US Open because she was pregnant. Her daughter, Liana, was born in February; Kerber's first competitive win since then came last week in Sydney, as a member of Germany's victorious United Cup team.

"For me to start my comeback like that, I mean, it couldn't be better, to be honest," she said. "It was a completely cold start for me. I had no idea where I was (competitively)."

One of her four losses was to top-ranked Iga Swiatek, one of the power players dominating the women's game. Regardless, the feeling of being back "was amazing; what I really missed."

ALSO READ: Former tennis world number one Wozniacki announces comeback

Wozniacki won the Australian Open in 2018, ending a long trophy drought. She married former NBA player David Lee the following year, quit the tour in 2020 and had two children, Olivia and James.

Denmark's Caroline Wozniacki plays a forehand return during a practice session ahead of the Australian Open tennis championships at Melbourne Park, Melbourne, Australia, on Jan 12, 2024. (PHOTO / AP)

She returned in time for last year's US Open, where she lost to eventual champion Coco Gauff in the round of 16.

She was given a wild-card entry for the Australian Open and warmed up in Auckland, New Zealand, last week, where she lost to another mom, Elina Svitolina.

Wozniacki won the Australian Open in 2018, ending a long trophy drought. She married former NBA player David Lee the following year, quit the tour in 2020 and had two children, Olivia and James

There'll be other mothers in the 128-player Australian Open women's singles draw, including twotime champion Victoria Azarenka, who reached the semifinals last year while traveling with her son, Leo.

She said the stereotype that you can't be an elite athlete and have a family had been broken.

"It's actually evolved more and more. The testament to that is how many players are feeling comfortable and confident in coming back and continuing on the tour," Azarenka said. "Though, I believe that there is still a lot more growth required in that space."

Three women have won major titles in the Open era after having children: Australians Margaret Court in Melbourne in 1973 and Evonne Goolagong Cawley at Wimbledon in 1980 and Belgian Kim Clijsters at the US Open in 2009.

Serena Williams missed four majors before making a comeback in 2018 after her first daughter, Olympia, was born, but wasn't quite able to add to her 23 Grand Slam titles.

READ MORE: Swiatek downs Kerber to put Poland ahead in United Cup final

Defending Australian Open champion Aryna Sabalenka beat Azarenka in the semifinals in Brisbane last week, and described Azarenka and Williams as inspirational for other athletes.

"Gives me belief," Sabalenka said, "that maybe one day I can have a baby and come back and play at a high level."