Naomi Osaka has parted company with coach Patrick Mouratoglou less than a year after the pair began working together, the four-times Grand Slam champion said days after her defeat to Emma Raducanu at the Washington Open.

Naomi Osaka surprised a day ago by announcing the end of her coaching partnership with Patrick Mouratoglou after 10 months of working together. The four-time Grand Slam champion had not made the leap she expected with the French coach by her side,

Naomi Osaka is making a major change at the start of the North American hard-court swing as the former world No. 1 decided to call time on her partnership with coach Patrick Mouratoglou.