Amidst 2025 preseason chronicles, Naomi Osaka teases she's writing a book ... maybe

Naomi Osaka: four-time Grand Slam singles champion, former world No. 1, and ... soon-to-be author? Already the subject of a biography written by tennis journalist Ben Rothenberg, Osaka might soon join other tennis legends like Andre Agassi and Maria Sharapova by penning an autobiography.

On Thursday night, Osaka shared on the social media platform Threads that she's been "writing a book" and wanted to share an excerpt, hoping that someone find it relatable. A day later, she followed through, sharing a candid excerpt of her musings. The four-slide post, titled "Ramblings1 (Self Love?)," chronicles how Osaka viewed herself in her youth, and how she's embraced her uniqueness and found self-acceptance as she's matured.

"Someone asked what the book is about and to be honest I don’t know how to classify it," she wrote in a subsequent post. "I would say it’s about my life, observations I made and lessons learned along the way."

Osaka's writings center on the theme of comparison, with her sharing how she measured herself against other people her age, and other tennis players, to her detriment. When she was a child, Osaka wrote, she even "potentially would've preferred to be someone else."

"Comparison is the thief of joy," she confessed. "When I was a teenager I used to compare myself to other people a lot. Whether it was from being a stereotypical teenage girl and thinking my body wasn't conventionally attractive because I'm an athlete, or comparing myself to other tennis players and thinking I'm behind."

"If felt like the more I preserved through rough times the more I began to appreciate myself and in that way started a strong comradeship between my body and my mind," she added. "I began to feel grateful every day when I woke up."

Read more: Osaka opens up about body image struggles, pressure to “snap back” after giving birth

The revelation came from the four-time Grand Slam champion amidst her posts chronicling her preseason training with coach Patrick Mouratoglou, sharing snapshots from the early days of their preparations for 2025 from on the campus of UCLA in California.

The beginnings of Osaka and Mouratoglou's partnership were cut short in the waning days of 2024, as she suffered a back injury at the China Open, was forced to retire in the round of 16 against Coco Gauff, and did not compete again through season's end.

In her comeback season following maternity leave, Osaka finished the year as the world No. 60 with a record of 22-18.