Osaka lost to Slovakia's Mia Pohankova 6-3 7-5 in the second round of the Pan Pacific Open in Tokyo. Pohankova, 18 years old and a wild-card entry, beat the seventh-seeded home favorite to reach the quarter-finals. She is the 2025 junior singles champion at Wimbledon. Osaka had won her first-round match over Jasmine Paolini before the upset.
Pohankova faces Alycia Parks in the last eight after Parks defeated Kimberly Birrell 6-3 6-1. Leylah Fernandez beat fifth-seeded Elise Mertens 6-2 7-6 (8-6) in another round-of-16 match. Top-ranked Elena Rybakina will play Yulina Putintseva in a late match. Both players were born in Russia but represent Kazakhstan.
Second-seeded Maja Chwalinska and fourth-seeded Belinda Bencic withdrew from the tournament with injuries. Chwalinska has a left-thigh injury. Bencic has a right-ankle injury.