Osaka has taken several breaks from the sport to prioritise her mental health, as well as a maternity break in 2023.
The two-time Australian Open and US Open champion returned to the Tour in 2024 following the birth of her daughter, Shai.
But Osaka said later that year that she did not “feel like I’m in my body” as she struggled to rediscover her best form.
On whether she feels closer to making another deep run at a major, Osaka said on Friday: “Yes, but honestly, right now I’m just really upset.
“I’m just going to be a negative human being today. I’m so sorry. I have nothing positive to say about myself, which is something I’m working on.
“I feel like, while I still have the opportunity to try to [compete], I want to.
“Even though I get very upset when I lose, but I think that’s my competitive nature.”
Two-time semi-finalist and 14th seed Elina Svitolina of Ukraine was knocked out by Belgium’s Elise Mertens 6-1 7-6 (7-4), but 13th seed Amanda Anisimova progressed with a 6-3 5-7 6-3 win against Hungary’s Dalma Galfi.
