Four-time Grand Slam champion Naomi Osaka of Japan pulled out of next week’s Pan Pacific Open in Tokyo on Friday because of a back injury.
The former world number one has been sidelined since she retired from her last-16 match at the China Open against eventual champion Coco Gauff at the start of the month.
She then pulled out of this week’s Japan Open in Osaka.
The 27-year-old was set to compete at the Pan Pacific Open as a wild card but organisers said she would be “absent because of a lower back injury”.
Osaka’s appearance at the China Open was her first tournament under Patrick Mouratoglou, the Frenchman best known for being Serena Williams’s long-time former coach.
She has struggled for consistency since returning to tennis in January after the birth of her daughter Shai in July 2023. Her best results since becoming a parent have been two quarter-final appearances.
China’s Olympic champion Zheng Qinwen — ranked number seven in the world — is the top-ranked player at the Pan Pacific Open.
Russia’s Daria Kasatkina and Brazil’s Beatriz Haddad Maia are also set to compete.
