Naomi Osaka walked off the court and walked towards the locker room, where she lay down, placing an oversized towel on her head.

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.

"I'm the kind of person who thinks a lot, almost to the point of overthinking. At times, when I play sports I must tell myself to let my mind go and go with my intuition," said Osaka,

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.