Naomi Osaka’s title defence at her home Pan Pacific Open ended on Thursday when the former world number one withdrew ahead of her second-round match against Beatriz Haddad Maia due to abdominal pain.
The four-time Grand Slam champion, has apologised for not being able to compete.
It was the latest setback for the 24-year-old, who sat out the entire grasscourt season with an Achilles injury and also retired from her first-round match in Toronto with a back problem in the lead-up to the U.S. Open.
