2-time Grand Slam winner Naomi Osaka sacks her second coach of 2019

Top seed at Flushing Meadows, former world number one Osaka struggled with a knee problem before being upset by 13th seed Belinda Bencic in straight sets in the fourth round.

2-time Grand Slam winner Naomi Osaka sacks her second coach of 2019
Top seed at Flushing Meadows, former world number one Osaka struggled with a knee problem before being upset by 13th seed Belinda Bencic in straight sets in the fourth round.