The Japanese tennis star Naomi Osaka said on Instagram that she cannot play Saturday's match against Australian qualifier Maddison Inglis because of injury.
"I had to make the difficult decision to withdraw because it is something that I have to deal with in my body after the last match," she wrote.
"It breaks my heart. But I can't risk making things worse."
In the second round, Osaka defeated Romanian Sorana Cirstea.
