TOKYO (AP) — Defending champion Naomi Osaka withdrew from the Pan Pacific Open ahead of her second-round match due to illness on Thursday.
"I am really sorry that I am not able to compete today," Osaka said in a statement. "It's an honor to be able to play at the Toray Pan Pacific Open in front of the amazing fans here in Japan. This has and always will be a special tournament for me and I wish I could have stepped on court, but my body won't let me. I will see you next year."
Osaka didn't specify the illness and said before the tournament she was fit and healthy. She was champion of the previous Pan Pacific in 2019 and advanced to the second round this week after Daria Saville retired with a knee injury in their first-round match.
Fifth-seeded Beatriz Haddad Maia of Brazil benefited by a walkover from Osaka's withdrawal and has a quarterfinal against fourth-seeded Veronika Kudermetova, who dominated Mexican qualifier Fernanda Contreras Gomez 6-0, 6-1.
In other second-round matches, Petra Martic upset sixth-seeded Karolina Pliskova 6-3, 6-4, and in a match of unseeded players, Liudmila Samsonova squeezed past China's Xinyu Wang 7-6 (5), 6-3.