In the first round, she was out-hit at Arthur Ashe Stadium by another big hitter Danielle Collins, two-time U.S. Open champion.
Osaka is left to consider another loss in the first round of the Grand Slam tournament.
Naomi Osaka Falls to American Danielle Collin
Collins was a major winner in her first final in her first major final at the Australian Open in January and showed the same hard-court
skills by winning 7-6 (5) 7-6 (5), and 6-3 win against Osaka in a showdown of shotmaking that concluded after Tuesday changed into Wednesday in Flushing Meadows.
who's been suffering from an injured back in recent times. "I feel like I just have to chill a little bit because there's a lot of like random chaos in my head right now."
In the last year, Osaka took two extended breaks from mental health, including following her exit from the third round at New York.
This year, Osaka lost in the third round of Australia and the opening round of the French Open, then sat out Wimbledon.