But later Thursday, Osaka told the Guardian newspaper in a statement she would return to the event on Friday to take on Elise Mertens in the semfinals.
“I was (and am) ready and prepared to concede the match to my opponent,” said Osaka.
“However, after my announcement and lengthy consultation with the WTA and USTA, I have agreed at their request to play on Friday. They offered to postpone all matches until Friday and in my mind that brings more attention to the movement. I want to thank the WTA and the Tournament for their support.”
Osaka’s agent confirmed the statement’s authenticity to CNN in an email.
Japan’s Osaka had taken to Twitter on Wednesday night after defeating Anett Kontaveit in the quarterfinals and speaking with reporters.
“Hello, as many of you are aware I was scheduled to play my semifinals match tomorrow,” the two-time grand slam winner began. “However, before I am an athlete, I am a black woman. And as a black woman I feel as though there are much more important matters at hand that need immediate attention, rather than watching me play tennis.
“I don’t expect anything drastic to happen with me not playing, but if I can get a conversation started in a majority white sport I consider that a step in the right direction.
“Watching the continued genocide of Black people at the hand of the police is honestly making me sick to my stomach.
“I’m exhausted of having a new hashtag pop up every few days and I’m extremely tired of having this same conversation over and over again. When will it ever be enough?”
The 22-year-old ended her post with the hashtags, Jacob Blake, Breonna Taylor, Elijah McClain and George Floyd.
Osaka — who has lived most of her life in the US and now resides in Los Angeles — joined protests in Minneapolis in the days after Floyd’s death.
Visited memorial for Floyd
“When I came back to Los Angeles, I signed petitions, I protested, and I donated, like many of us. But I kept asking myself what can I do to make this world a better place for my children? I decided it was time to speak up about systemic racism and police brutality.”
On Twitter, WTA founder Billie Jean King, a longtime advocate for equality, called Osaka’s move “brave and impactful.”
“Athletes using platforms for good means so much,” said King.
A statement issued by tennis governing bodies the WTA, ATP and USTA close to midnight on Wednesday said: “As a sport, tennis is collectively taking a stance against racial inequality and social injustice that once again has been thrust to the forefront in the United States.
“The USTA, ATP Tour, and WTA have decided to recognize this moment in time by pausing tournament play at the Western & Southern Open on Thursday, August 27. Play will resume on Friday, August 28.”