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.

Osaka's time with Mouratologou followed an up-and-down sequence of promising signs and frustrations with either injury or close-run defeats.

As per recent developments, Naomi Osaka and Patrick Mourtaglou will no longer be working together. The Japanese ace took to Instagram story to announce the split.